Livro-texto de introdução à lógica, com (mais do que) pitadas de filosofia da lógica, produzido como uma versão revista e ampliada do livro Forallx: Calgary. Trata-se da versão de 13 de outubro de 2022. Comentários, críticas, correções e sugestões são muito bem-vindos.

Wij presenteren Berardi’s herwerking van de ideologiekritiek in drie stappen. Eerst schetsen wij de context waarin Berardi de ideologiekritiek herdenkt. Hij bouwt verder op de ontdekking van Deleuze en Guattari dat de taal van het kapitalisme niet de code, maar de axiomatiek is. De economische wetenschap biedt, volgens hen, mensen geen identiteit aan, maar bestaat uit een reeks commando’s die stromen van geld, arbeid, elektriciteit, enzovoort reguleert. Daaraan koppelt Berardi de observatie dat het hedendaagse kapitalisme vooral tekens verhandelt in plaats (...) van producten waarnaar zulke tekens zouden verwijzen. In een tweede stap brengen wij tegen deze opvatting in dat Berardi nog steeds vasthoudt aan de representatieve waarde van de economische wetenschap. Deze laatste zou enkel een afbeelding bieden van de realiteit en die vervalsen in het voordeel van het status quo. Sociologen uit de traditie van de actor-netwerktheorie (ANT) hebben dat echter betwist. Zij beweren dat de economische wetenschap de economische realiteit niet zozeer afbeeldt, maar actief vormgeeft. De economische wetenschap heeft de mens geschapen naar zijn evenbeeld: als homo oeconomicus. Het is dan ook een vergissing om de economische wetenschap te bekritiseren voor haar valse representaties. Zij maakt die immers waar. In een derde en laatste stap leggen wij in Berardi’s teksten een nieuw criterium bloot voor ideologiekritiek. In plaats van de economische wetenschap te bekritiseren voor haar valse uitspraken over de realiteit, moeten wij nagaan of de economische wetenschap een manier van leven promoot die mensen in staat zijn te onderhouden. De economische wetenschap is dan ideologisch als en slechts als zij een onhoudbare vorm van leven propageert. Volgens Berardi kan de hedendaagse economische wetenschap hiervan terecht beschuldigd worden. In zijn psychopathologie van het kapitalisme wijst hij immers op de negatieve psychische gevolgen van het hedendaagse kapitalisme, namelijk de instandhouding van een cyclus tussen paniek en depressie, een verlies aan betekenisvol menselijk contact en een neiging tot neurotisch vasthouden aan oude economische recepten die hun failliet reeds meermaals bewezen hebben. Niet de waarheid zal ons verlossen, maar in de verlossing ligt het ware leven. (shrink)

Necessitists about set theory think that the pure sets exists, and are the way they are, as a matter of necessity. They cannot explain why the sets (de rebus) are all the sets. This constitutes the Ur-Objection against necessitism; it is the primary motivation cited by potentialists about set theory. -/- At least three families of potentialism draw motivation from the Ur-Objection. Contingentists think that any things could form a set even if they actually did not. Prioritists think that sets (...) hyperintensionally depend upon their members. Structural-potentialists think that any possible set-hierarchy could be extended. However, once we have disentangled these three versions of potentialism, we see that the Ur-Objection should not motivate anyone. (shrink)

Shadow pictures radically changed the modern understanding of pictorial concepts. Tim Otto Roth’s broadly based cultural history traces the consequences of this revolution of methods of vision and image production in the sciences and the arts. By means of abundant image and text sources he develops a picture theory based on physics and projective geometry. This definitive book comprising 500 pages provides a generally understandable and vivid insight in the history of shadowgraphs from the 19th century until the present age. (...) A crucial role play scientific processes as the X-ray technique, but also the artistic examination of space and body. (shrink)

This essay highlights a methodological weakness in Foucault’s genealogy of neoliberalism often mistaken for a biographical shift in his philosophy. Naissance de la biopolitique is sometimes interpreted as evidence for Foucault’s conversion to neoliberalism, whereas its lack of critical acuity stems rather from its methodological limitations. Through a discussion of the “neoliberal conversion”-thesis, I highlight those limitations. Though Foucault’s appreciative tone in his neoliberalism lectures is surprising, his aim is mainly to defamiliarize readers from the dominant mode of neoliberal rationality (...) so that they can affirm the creative potential to foster new conducts, new identities, and new rationalities. Foucault did not convert to neoliberalism, but sought to destabilise it by revealing its historical contingency. However, as Foucault’s surprisingly positive tone shows, this strategy is insufficient for combatting neoliberalism. There is an elective affinity between Foucault’s own politics of creative self-reinvention and neoliberalism’s promise of a non-invasive, post-disciplinary government by indirect economic incentives alone. Foucault’s libertine stance toward subjectivity hence seems easily integrated into a neoliberal conduct of conducts. I propose to supplement Foucault’s genealogical method as he deploys it in Naissance de la biopolitique with an immanent critique of neoliberalism from the perspective of the governed. Rather than investigating neoliberal rationality as a promising endeavour for the future, we can study the real-life implementations of neoliberalism and their effects on subjective conducts. Neoliberal rationality is involved in a permanent struggle to shape the conduct of conducts along entrepreneurial and competitive lines, but subjects are refractory living beings whose conducts are not so simply transformed. Neoliberalism has had to give up its post-disciplinary aspirations and turn to the power of discipline and abandonment to enforce neoliberal norms of conduct. Neoliberalism has transformed into a negative biopolitics that sacrifices the lives of unproductive subjects as collateral damage to the overall welfare of the population. Immanent critique thereby reveals how subjects are pushed beyond their limits until neoliberal norms of conduct become unbearable. This intolerability of neoliberalism cannot be directly deduced from the writings of Becker, Friedman, or Hayek.111 It becomes manifest in the confrontation between neoliberal rationality and the material living bodies of finite human beings unable to be stretched in the ways neoliberalism requires. (shrink)

The theme of these is essays is what might be called, rather ambitiously, the nature of the human mind. Psychologists and philosophers both investigate the nature of the mind, but from rather different angles. Psychologists and neuroscientists investigate the actual mechanisms in the brain, the body and the world which underpin mental events and processes. Philosophers, by contrast, ask more abstract questions: for example, about what makes any process mental at all, or how mental reality fits into the rest of (...) reality. Psychology and philosophy are not opposed disciplines, but complementary, and the boundary between them is not sharp. The essays collected here address some of the most abstract philosophical questions, and barely touch on actual psychological discoveries. Nonetheless, I think everything that is said in this book is consistent with what psychologists have discovered and will discover. Where psychologists will want to disagree with things said in this book, their disagreement will be based on a difference of some philosophical opinion. (shrink)

R.M. Sainsbury's account of reference has many compelling and attractive features. But it has the undesirable consequence that sentences of the form "x is thinking about y" can never be true when y is replaced by a non-referring term. Of the two obvious ways to deal with this problem within Sainsbury's framework, I reject one and endorse the other. This endorsement is also within the spirit of Sainsbury's account of reference. /// La explicación que ofrece R.M. Sainsbury de la referencia (...) tiene muchas características convincentes y atractivas, pero tiene la consecuencia indeseable de que oraciones de la forma "x está pensando acerca de y" nunca pueden ser verdaderas cuando se reemplaza y con un término no referencial. De las dos maneras obvias de tratar este problema dentro del marco teórico de Sainsbury, rechazo una y acepto la otra. Aceptar esta última también cae dentro del espíritu de la explicación de la referencia ofrecida por Sainsbury. (shrink)

Hilary Putnam’s Realism with a Human Face began with a quotation from Rilke, exhorting us to ‘try to love the questions themselves like locked rooms and like books that are written in a very foreign tongue’. Putnam followed this advice throughout his life. His love for the questions permanently changed how we understand them. In Naturalism, Realism, and Normativity – published only a few weeks after his death – Putnam continued to explore central questions concerning realism and perception, from the (...) perspective of ‘liberal naturalism’. The volume’s thirteen papers were written over the past fifteen years (only one paper is new), and they show a man who fully inhabited the questions he loved. And the main significance of this book is that it shows – implicitly, but very clearly – quite how much of Putnam’s contribution to his philosophy is continuous with his ‘The Meaning of “Meaning”’. (shrink)

Was ist das distinktive philosophische Problem der Perzeption? Hier wird behauptet, dass es der Konflikt zwischen der Natur der perzeptuellen Erfahrung ist, wie sie uns intuitiv erscheint und gewisser Möglichkeiten, die der Idee der Erfahrung implizit innewohnen: der Möglichkeiten von Illusion und Halluzination. Die perzeptuelle Erfahrung kommt uns vor wie eine Einstellung zu den eigenen Objekten, eine Art „Weltoffenheit“, die ein direktes Bewusstsein von den bestehenden Objekten und ihren Eigenschaften einschließt. Doch wenn jemand eine gleichartige Erfahrung haben kann, ohne dass (...) das Objekt da wäre – Halluzination dieses Objektes – dann scheint die perzeptuelle Erfahrung unmöglich essenziell ein solches Verhältnis zu sein. Dies ist das fundamentale philosophische Problem der Perzeption; verschiedene philosophische Perzeptionstheorien des 20. und 21. Jahrhunderts können als Antworten darauf verstanden werden. (shrink)

In De Rerum Natura III 963-971, Lucretius argues that death should not be feared because it is a necessary part of the natural cycle of life and death. This argument has received little philosophical attention, except by Martha Nussbaum, who asserts it is quite strong. However, Nussbaum's view is unsustainable, and I offer my own reading. I agree with Nussbaum that, as she construes it, the cycle of life argument is quite distinct from the better-known Epicurean arguments: not only does (...) it start from different premises, but it is a completely different type of argument. However, thus construed, it is deeply problematic. It relies on premises that are much more at home in Stoic than in Epicurean ethics, and Lucretius' appeal to nature in this argument contradicts what he says elsewhere in De Rerum Natura. I consider why Lucretius offers what appears to be such a flawed argument, and I propose a reading on which the cycle of life argument could be offered consistently by an Epicurean. The cycle of life argument, unlike the better-known arguments, does not attempt directly to show that death is not a bad thing. Instead, it targets certain destructive attitudes towards one's life that result in one fearing death. By helping relieve the interlocutor of these attitudes, the argument aims at reducing his fear of death. (shrink)

David Furley's work on the cosmologies of classical antiquity is structured around what he calls "two pictures of the world." The first picture, defended by both Plato and Aristotle, portrays the universe, or all that there is (to pan), as identical with our particular ordered world-system. Thus, the adherents of this view claim that the universe is finite and unique. The second system, defended by Leucippus and Democritus, portrays an infinite universe within which our particular kosmos is only one of (...) countless kosmoi. Aristotle's argument in De caelo I.9 that the world is necessarily unique is an important contribution to this debate. This argument holds interest because it shows Aristotle wrestling with an apparent inconsistency in his own philosophy, as deeply-held convictions within his cosmology collide with an equally deeply-held conviction within his metaphysics. The following three principles, each of which Aristotle appears committed to, are inconsistent: -/- The cosmic uniqueness principle. The world is necessarily unique. The cosmic form principle. The world is an ordered, structured unity. As such, the world has a form. The possibility of multiple instantiation principle. For all F, if F is a form, it is possible that there exist multiple Fs. In De caelo I.9, Aristotle argues that we can establish the uniqueness of the universe, reject the multiple instantiation principle, yet still retain the distinction between 'this world' and 'world in general,' if the following is true (as it is): the world takes up all the matter that exists. Aristotle illustrates this argument with one of the stranger analogies in his corpus: imagine an aquiline nose that takes up all the flesh in the universe. If this were so, then there could not exist any other aquiline objects whatsoever. (For this reason, we dub the De caelo I.9 argument the 'Cosmic Nose argument.') This paper is an interpretation of how this argument is supposed to proceed and an assessment of its success. The first section states the problem Aristotle is confronted with, sorts through Aristotle's various statements of the Cosmic Nose argument, which exhibit some sloppiness, and reconstructs charitably a single argument. We also spend some time examining the significance of Aristotle's example of a gigantic aquiline nose. We argue that, even charitably reconstructed, the argument appears to commit a serious modal fallacy. The remainder of the paper explores whether this modal fallacy can be overcome. We conclude that, although not a cogent argument for the uniqueness of the world (as this would require a significant revision of our current astronomy), the Cosmic Nose argument does succeed on its own terms. However, it should not be regarded as a free-standing argument for the uniqueness of the world. Instead, it depends crucially on the earlier argument in De caelo I.8 for the universe's uniqueness; De caelo I.9 should be viewed as an attempt to extend the conclusion of De caelo I.8 and to show how this conclusion can be made consistent with Aristotle's metaphysical principles about the nature of form. (shrink)

What is distinctive about Lucretius’s version of Epicureanism? The answer might appear to be “nothing,” for two reasons. First, Epicureanism in general is doctrinally conservative, with followers of Epicurus claiming to follow his authority. Second, Lucretius claims to be merely transmitting the arguments of his beloved master Epicurus in a pleasing manner. I argue that these considerations do not prevent De Rerum Natura from presenting a distinct version of Epicureanism. Its arguments in physics are almost certainly drawn from Epicurus himself. (...) But in the examples Lucretius uses to illustrate these arguments, as well as in his descriptions of things like the fear of death and the formation of society, Lucretius delivers unexpected insights into human psychology, ones not clearly present in the other sources we have on Epicureanism. Furthermore, the way in which Lucretius presents his arguments can rightly be considered original philosophically and not just poetically. (shrink)

Titus Lucretius Carus was an ardent disciple of Epicurus and the author of the De Rerum Natura, one of the greatest poems in Latin. Other than his approximate dates of birth and death, we have next to no reliable information about him. Because of his family name and his apparent familiarity with Roman upper-class mores, it is thought that Lucretius was probably a member of the aristocratic clan of the Lucretii, but this is not certain. And so any insight we (...) wish to gain into the thought and personality of Lucretius must come from the De Rerum Natura itself. (shrink)

The first part of this paper looks into the question of Lucretius’ philosophical sources and whether he draws almost exclusively from Epicurus himself or also from later Epicurean texts. I argue that such debates are inconclusive and likely will remain so, even if additional Epicurean texts are discovered, and that even if we were able to ascertain Lucretius’ philosophical sources, doing so would add little to our understanding of the De Rerum Natura. The second part of the paper turns to (...) a consideration of what Lucretius does with his philosophical sources. The arguments within the De Rerum Natura are not original. Nonetheless, the way Lucretius presents these arguments establishes him as a distinctive philosopher. Lucretius deploys non-argumentative methods of persuasion such as appealing to emotions, redeploying powerful cultural tropes, and ridicule. These methods of persuasion do not undercut or displace reasoned argumentation. Instead, they complement it. Lucretius’ use of these methods is rooted in his understanding of human psychology, that we have been culturally conditioned to have empty desires, false beliefs, and destructive emotions, ones that are often subconscious. Effective persuasion must take into account the biases, stereotypes, and other psychological factors that hinder people from accepting Epicurus’ healing gospel. (shrink)

The paper presents an extension of the metaphysics of self-subsisting structures set out in a companion paper to the realm of non-relativistic quantum physics. The discussion is centered around a Pure Shape Dynamics model representing a relational implementation of a de Broglie-Bohm N-body system. An interpretation of this model in terms of self-subsisting structures is proposed and assessed against the background of the debate on the metaphysics of quantum physics, with a particular emphasis on the nature of the wave function. (...) The analysis shows that elaborating an appropriate Leibnizian/Machian metaphysics of the quantum world requires a substantial revision of the notion of world-building relation. (shrink)

The competence is the second must important need for a person, after autonomy. The competence is an indicator for a social integration, for quality of participation in groups. The current definition of competence used in education is proposed from a III- stage of culture, but our definition is from V cultural stage (David Logan). In our work we compare the human condition with the light. We are in the same time individual person and also parts in a supra-individual systems. Between (...) this two position we must found the middle way to be and act. From modern physical theory to religion, from Heidegger to Patsy Rodemburg Presence, from Berne transactional analyse Buber I-Tou and nonviolent communication, from classical education limits to modern coaching perspective (Tim Gallwy), the most important cultural point of view is integrated in a equilibrated perspective that respect individual condition and understand the importance of cultures. I recognized three level of participation - to itself, in relation and to social systems cultures. After introduction that present this new perspective, the part two is dedicated to personal perspective, the next part to relation, including unconditional love, and the four part to culture importance. In the last part I try to take a look to the competence development. (shrink)

À propos de la possibilité de voyager dans le temps sur la base de plusieurs ouvrages spécialisés, notamment ceux de Nicholas J. J. Smith (« Time Travel »), William Grey (« Troubles with Time Travel »), Ulrich Meyer (« Explaining causal loops »), Simon Keller and Michael Nelson (« Presentists should believe in time-travel »), Frank Arntzenius and Tim Maudlin (« Time Travel and Modern Physics »), et David Lewis (« The Paradoxes of Time Travel »). L'article commence par une (...) Introduction dans laquelle je fais une brève présentation du voyage dans le temps et poursuit par une Histoire du concept de voyage dans le temps, les principaux aspects physiques du voyage dans le temps, y compris les voyages dans le temps dans le passé dans la relativité générale et la physique quantique , et les voyages dans le temps dans le futur, puis une présentation du Paradoxe du grand-père abordé dans presque toutes les œuvres spécialisées, suivie d’une section consacrée à la Philosophie du voyage dans le temps et d’une section dans laquelle j’analyse les Boucles causales pour le voyage dans le temps. Je termine mon travail avec Conclusions, dans laquelle je maintiens mes opinions personnelles sur le voyage dans le temps et la Bibliographie sur laquelle repose le travail. -/- TABLE: -/- Abstract Introducere Istoria conceptului de călătorie în timp Paradoxul bunicului Filosofía călătoriei în timp Buclele cauzale Concluzii Note Bibliografie -/- DOI: 10.13140/RG.2.2.27116.51841. (shrink)

Preliminary Material /Reto Rössler, Tim Sparenberg and Philipp Weber -- Kosmos & Kontingenz /Reto Rössler, Tim Sparenberg and Philipp Weber -- "De la théorie à la pratique“ /Eva Marie Noller -- Mittelalterliche Kosmologie und Kontingenz /Cornelia Selent -- Kontingenz der Stimmen im Kosmos der Lettern -,Atomologie', Technologie und William Baldwins Beware the Cat /Ronja Bodola -- Hypothese, Abweichung und Traum Keplers Ellipsen /Reto Rössler -- "Nur leerer Raum und Schatten“ /Hartmut Böhme -- Gewissheit als sentiment /Christian Reidenbach -- Poiesis im (...) "Gegenhalt“ der anderen Welten: Epistemische und kosmologische Kontingenz bei Breitinger und Brockes /Johannes Wankhammer -- Ungereimtheit - Poesie und Prosa um 1755 /Wolfgang Hottner -- "Es giebt freylich unzähliche Welten“ /Tim Sparenberg -- Kontingenz, Ordnung und realer Grund bei Kant /Thijs Menting -- Im Grunde das Regellose /Philipp Weber -- Kontingenz und Latenz /Helmut Müller-Sievers -- Revolution in Permanenz: Auguste Blanquis Ewigkeit durch die Sterne /Alexandra Heimes -- "Kosmische Gesetze“? /Elisa Ronzheimer -- Vom unendlichen Universum zur Dialektik der Kontingenz /Thomas Ebke -- Stetigkeit im kosmischen Diskontinuum /Timothy Attanucci -- Versuch einer Kosmologie des Performativen in der Kunst /Maximilian Haas -- Kosmopolitismus und Internationalismus: Zwei Modelle, zwei Erbschaften /Étienne Balibar -- Vom kontingenten Kosmos zur Kosmopolitik /Karin Harrasser -- Auswahlbibliographie /Reto Rössler, Tim Sparenberg and Philipp Weber -- Begriffsregister /Reto Rössler, Tim Sparenberg and Philipp Weber -- Autorinnen und Autoren /Reto Rössler, Tim Sparenberg and Philipp Weber. (shrink)

În această lucrare analizez posibilitatea călătoriei în timp pe baza mai multor lucrări de specialitate, printre care cele ale lui Nicholas J.J. Smith ("Time Travel", The Stanford Encyclopedia of Philosophy”), William Grey (”Troubles with Time Travel”), Ulrich Meyer (”Explaining causal loops”), Simon Keller și Michael Nelson (”Presentists should believe in time-travel”), Frank Arntzenius și Tim Maudlin ("Time Travel and Modern Physics") și David Lewis (“The Paradoxes of Time Travel”). Lucrarea începe cu o Introducere în care fac o scurtă prezentare a (...) călătoriei în timp, și continuă cu o Istoria conceptului de călătorie în timp, prezentarea principalelor Aspecte fizice ale călătoriei în timp, inclusiv călătoria în timp în trecut în relativitatea generală și în fizica cuantică și călătoria în timp în viitor, apoi o prezentare a Paradoxul bunicului care este abordat în aproape toate lucrările de specialitate, urmat de o secțiune dedicată Filosofiei călătoriei în timp, și o secțiune în care analizez Buclele cauzale pentru călătoria în timp. Finalizez lucrarea cu Concluzii, în care expun opiniile personale privind călătoria în timp, și Bibliografia pe care se bazează lucrarea. (shrink)

Hiện nay, mạng xã hội (MXH) là kênh thuận lợi để người tiêu dùng (NTD) tìm và mua thực phẩm chức năng (TPCN) cho mẹ và bé. Nghiên cứu khám phá và đánh giá những yếu tố tác động đến ý định mua TPCN dành cho mẹ và bé qua MXH tại tỉnh Đồng Nai thông qua 363 mẫu khảo sát hợp lệ được thu thập, phân tích Cronbach’s Alpha, EFA, CFA và SEM nhằm kiểm định mô hình và sự (...) phù hợp của các giả thuyết nghiên cứu. Kết quả cho thấy, 7/11 giả thuyết được chấp nhận; trong đó, Thái độ, Cảm nhận rủi ro và Nhận thức kiểm soát hành vi tác động trực tiếp đến Ý định mua hàng. Nhận thức tính hữu ích, Nhận thức tính dễ sử dụng, Cảm nhận rủi ro và Truyền miệng điện tử (eWOM) tác động gián tiếp. (shrink)

Trước đây, trong hoàn cảnh chiến tranh, thiếu thốn vật chất, đói nghèo, sự mất mát luôn thường trực, chúng ta đã phải dựa vào ý chí và trí tuệ để sáng tạo, thích nghi, tìm kiếm giải pháp, và vượt qua nghịch cảnh, từ đó xây dựng nên cuộc sống như ngày hôm nay. Mặc dù hiện tại cuộc sống vẫn còn không ít thiếu sót, nhưng nó vẫn tốt đẹp và đầy đủ hơn rất nhiều so với trước (...) đây. Vậy thì những thiếu sót và áp lực nhỏ hiện tại đâu phải là lý do để chúng ta tự tạo ra những ảo giác về sự dễ tổn thương hay các vết rách tinh thần, để rồi cần trốn tránh thực tại và tìm kiếm sự chữa lành? Giải pháp, đôi khi, lại đơn giản hơn chúng ta nghĩ: bỏ từ “chữa lành” ra khỏi vốn từ, khỏi cách nghĩ, và tập trung vào việc xây dựng một văn hóa sống có kỷ luật và trật tự. Quan trọng hơn cả, là hành trình tự thân tìm kiếm ý nghĩa sống đích thực. Ý nghĩa cuộc sống được hình thành từ sự tương tác giữa bản thân với con người, sự vật, và sự việc xung quanh. Đứng trước những áp lực và thử thách hàng ngày của cuộc sống, nếu biết tu kham nhẫn, chúng sẽ trở thành cơ hội để rèn giũa bản thân, tạo điều kiện để con người sáng tạo, vượt qua giới hạn, từ đó hoàn thành được những mục tiêu lớn lao. Cho nên, điều cần chữa lành không phải là những bất mãn vì bị sếp nhắc nhở vì uống cà phê trong giờ làm, mà là môi sinh đang bị hủy hoại, là trái đất đang đứng trước bờ vực của biến đổi khí hậu, là những cuộc chiến tiêu diệt nền văn minh và những giá trị nhân bản của con người. Sự chữa lành đích thực bắt đầu từ ý thức trách nhiệm với cộng đồng và hành tinh này. Đó cũng là nơi khoa học về lòng biết ơn đóng vai trò quan trọng, giúp chúng ta trân trọng những điều nhỏ bé, nuôi dưỡng sự bền bỉ để vượt qua khó khăn, và tìm thấy sự cân bằng. Chữa lành không phải là trốn tránh thực tại, mà là đối mặt với nó bằng tâm thế biết ơn và khao khát đóng góp cho một thế giới tốt đẹp hơn. (shrink)

Sự thâm nhập của trí tuệ nhân tạo (AI) tạo sinh vào ngành báo chí đã tạo nên sự thay đổi về xu hướng tiêu thụ và sản xuất thông tin. Cụ thể, có năm thay đổi trong xu hướng hành vi tiêu thụ và sản xuất thông tin như sau: việc tạo ra nội dung trở nên dễ dàng và đa dạng hơn; AI tạo sinh có thể là tiếp điểm mới của con người đối với dòng chảy của (...) tin tức; ranh giới mờ giữa người tiêu thụ thông tin và người sản xuất thông tin; sự thuận tiện, dễ dàng trong việc tạo ra giá trị gia tăng cho các nội dung; sụ thay đổi quá trình sáng tạo và thậm chí là định nghĩa về sự sáng tạo trong nghề báo chí. Từ năm thay đổi trong hành vi trên, những ảnh hưởng lên kinh tế báo chí của AI tạo sinh đã được phân tích. Các phân tích chạm tới cả mặt tích cực của AI tạo sinh trong việc giảm chi phí và tăng giá trị của nội dung tin tức, cũng như những vấn đề đáng lo ngại đối với việc giảm doanh thu của báo chí: vấn đề tìm kiếm không nhấp chuột, bản quyền, đối tượng tiếp cận thông tin, kiểm soát chất lượng và nguồn tin. Những vấn đề trên cho thấy sự quan trọng trong việc sử dụng AI tạo sinh một cách có trách nhiệm xã hội và điều này đặt ra những câu hỏi đáng suy nghĩ cho toàn xã hội. (shrink)

This essay is an inquiry into John McDowell’s thinking on ‘subjectivity.’ The project consists in two parts. On the one hand, I will discuss how McDowell understands and responds to the various issues he is tackling; on the other, I will approach relevant issues concerning subjectivity by considering different aspects of it: a subject as a perceiver, knower, thinker, speaker, agent, person and (self-) conscious being in the world. The inquiry begins by identifying and resolving a tension generated by the (...) very idea of ‘rational animal’: human beings are at the same time natural and rational. Later the inquiry proceeds by considering how McDowell’s notion of ‘second nature’ enables us to be human subjects with many faces. By going through the diagnoses and responses of McDowell, two central problems in modern and contemporary philosophy – the narrow conception of nature and the Cartesian inner space model – are identified and repelled. In Episode N I first urge that we should leave room for a certain notion of ‘world.’ I further argue that mentality has many aspects, and to understand those aspects is to understand the many faces of human subject. In Episode Ⅰ the Aristotelian notion of ‘second nature’ is discussed in order to resolve the tension in the very idea of ‘rational animal.’ Later I reply to some worries about this maneuver, including the objection from Crispin Wright. Hans-Georg Gadamer’s distinction between world and environment is introduced and related to McDowell’s thinking. Episode Ⅱ discusses perception and knowledge; McDowell’s main target – the Cartesian inner space – is introduced and criticized. Barry Stroud’s and Simon Blackburn’s positions are evaluated. Later I connect the main theme of Mind and World to the present context; in particular, I discuss McDowell’s invocation of Donald Davidson and Immanuel Kant. And then I discuss a common accusation of idealism, and Robert Brandom’s accusation of ‘residual individualism.’ Episode Ⅲ concentrates on Saul Kripke’s Wittgenstein, arguing that the master thesis behind the rule-following paradox is a version of the inner space model, and that Kripke’s Wittgenstein is not Wittgenstein. Martin Kusch’s objections are answered; Michael Dummett’s demand of reductionism is rebutted. After this, I turn to Davidson’s ‘no language’ claim, and discuss to what extent McDowell agrees with him. In Episode Ⅳ I evaluate objections from Hubert Dreyfus concerning action and agency. I discuss how Dreyfus and Maurice Merleau-Ponty commit ‘the Myth of the Disembodied Intellect’ identified by McDowell. I answer Michael Ayer’s charge of intellectualism in passing. Later I bring in McDowell’s objections to Derek Parfit on personhood and to Davidson on the mind-body relation. In Episode Ⅴ I focus on consciousness and self-consciousness. McDowell applies his argument against Parfit to Kant, but Maximilian de Gaynesford dissents. I reply to his objections on McDowell’s behalf. I further connect this to McDowell’s attacks on the dualism of scheme and content. This leads to my McDowellian rejection to the existence of qualia, and further brings me to the debate between intentionalism and disjunctivism in the context of the argument from illusion. I argue against Tim Crane’s ways of conceiving issues about intentionalism and the argument from illusion. Varieties of disjunctivism are also discussed. In my Epilogue, I express my worry about McDowell’s notion of ‘self-determining subjectivity.’ According to McDowell, human freedom consists in causations in the space of reason, but as Richard Gaskin points out, a satisfying story of it is yet to be provided. I close this essay with some rough ideas about how to fill in the details of the McDowellian picture. (shrink)

Loài người có một nỗi niềm rung động rất khó tả khi khai quật được những đồ tạo tác từ thuở xa xưa. Những ngành khoa học như cổ sinh vật học, hay khảo cổ học phản ánh chính sự tò mò và niềm khao khát hiểu biết quá khứ, lịch sử tiến hóa của thế giới tự nhiên. Ngành vật lý cũng dành rất nhiều công sức để tìm hiểu sự ra đời và tiến hóa của vũ trụ. Trong (...) đời sống xã hội, các ngành nhân văn còn có cả những ấn phẩm về lịch sử nghệ thuật, như Art History hay Journal of Art History. Với cùng suy tư và nỗ lực phục hồi giá trị nhân văn cho sự nghiệp bảo tồn đa dạng sinh học và tự nhiên, chúng tôi tìm được một bức ảnh về chim bói cá, được chụp cách đây gần một thế kỷ, của tác giả A. F. Skutch trên The Condor. Thật sự không dễ dàng để có được một bức ảnh sinh động, chân thực và gợi lên nhiều cảm xúc. Bức ảnh này có khả năng lay động tâm tư suy nghĩ của người xem và đánh thức lương tri vì một môi trường sống đáng sống. (shrink)

Loài người có một nỗi niềm rung động rất khó tả khi khai quật được những đồ tạo tác từ thuở xa xưa. Những ngành khoa học như cổ sinh vật học, hay khảo cổ học phản ánh chính sự tò mò và niềm khao khát hiểu biết quá khứ, lịch sử tiến hóa của thế giới tự nhiên. Ngành vật lý cũng dành rất nhiều công sức để tìm hiểu sự ra đời và tiến hóa của vũ trụ. Trong (...) đời sống xã hội, các ngành nhân văn còn có cả những ấn phẩm về lịch sử nghệ thuật, như Art History hay Journal of Art History. Với cùng suy tư và nỗ lực phục hồi giá trị nhân văn cho sự nghiệp bảo tồn đa dạng sinh học và tự nhiên, chúng tôi tìm được một bức ảnh về chim bói cá, được chụp cách đây gần một thế kỷ, của tác giả A. F. Skutch trên The Condor [1]. Thật sự không dễ dàng để có được một bức ảnh sinh động, chân thực và gợi lên nhiều cảm xúc. Bức ảnh này có khả năng lay động tâm tư suy nghĩ của người xem và đánh thức lương tri vì một môi trường tràn đầy sự sống. (shrink)

Trong lúc vào rừng, đã hơn 3 lượt người dân bản Mường ở Hòa Bình có nói tới cây lá han. Đây là loại cây “độc” người đi rừng luôn phát hiện để tránh. Khi phát hiện ra những vùng nhiều cây này đan xen với các loại cây cỏ khác, mà có khả năng dễ nhầm lẫn với nhau, người dân sẽ tìm cách đánh dấu và báo nhau để tránh. Nếu ở các vị trí dễ gây tổn thương, (...) thì người phát hiện có thể chặt bỏ để tránh cho những người khác vô tình chạm phải. (shrink)

Vào thời kỳ khai sáng, để trao đổi ý tưởng khoa học, các nhà triết học và sử học tự nhiên thường xuất bản chung một quyển sách và viết thư cho nhau. Điều này tạo tiền đề cho việc thành lập các hội và các tạp chí khoa học đầu tiên trên thế giới. Các hội học thuật bao gồm Viện Hàn lâm Khoa học Leopoldina (năm 1652), Hội Hoàng gia Luân Đôn (1660), và Học viện Khoa học Pháp (...) (1666). Tạp chí khoa học đầu tiên là Journal des sçavans (tháng 01/1665) và ngay sau đấy là Philosophical Transactions of The Royal Society (tháng 03/1665). Việc xuất hiện các tạp chí học thuật có thể xem như là kết quả của một quá trình “tiến hóa”, trong đó giới khoa học cố gắng tìm cách cải thiện hiệu suất và hiệu quả của việc lưu thông và trao đổi các thông tin khoa học. Tuy nhiên, khi số lượng thông tin tăng nhanh chóng, việc đảm bảo chất lượng là một trong những ưu tiên hàng đầu của giới khoa học. Nhu cầu này dẫn đến sự xuất hiện của hệ thống bình duyệt và gần đây là cơ chế rút bài báo khoa học. (shrink)

O presente artigo aborda a instituição de órgãos de polícia como representantes do poder e da autoridade do Estado sob a ótica da filosofia, sobretudo no contexto do contrato social, fundamentada em revisão bibliográfica. Ainda que o homem tenha preterido sua liberdade natural em prol de uma liberdade assistida, e sendo a polícia um dos órgãos responsáveis por essa assistência, não há como afirmar que esse trabalho está correspondendo aos anseios da sociedade, sobretudo ao se analisar os índices de violência (...) que a envolvem. Nesse sentido, a sociedade vem questionando a necessidade da existência dessas instituições, muitas vezes, inclusive, pedindo sua extinção. (shrink)

O presente artigo tem por objetivo mostrar, desde a psicanálise freudiana, um caminho possível que a leva ao encontro da filosofia de orientação fenomenológica. Em O eu e o isso, de 1923, Sigmund Freud emprega uma nova noção pouco explorada na literatura psicanalítica: o eu-corpo. O escopo de nossa análise delimita-se à interpretação e à explicitação da noção de eu-corpo tal como esta foi apresentada por Freud, confrontando-a com a fenomenologia em Merleau-Ponty e Michel Henry. Para tanto, propomos uma análise (...) em quatro tempos. Inicialmente, evidenciaremos o entendimento de Freud sobre o modelo de psicologia originada em Brentano que tem como um de seus desdobramentos a fenomenologia. Depois, mostraremos como a concepção do isso, segundo o próprio texto de Freud, foi determinante para que ele formulasse uma revisão da primeira tópica e a incorporasse em uma segunda tópica. Por fim, nas últimas duas partes, examinaremos o tratamento dado por Merleau-Ponty e Michel Henry à questão do corpo. Concluímos que é possível o encontro entre a psicanálise e a fenomenologia via a noção de eu-corpo freudiano; contudo, tal condução implicará reformulações em teses centrais da psicanálise. (shrink)

Niche construction theory highlights the active role of organisms in modifying their environment. A subset of these modifications is the developmental niche, which concerns ecological, epistemic, social and symbolic legacies inherited by organisms as resources that scaffold their developmental processes. Since in this theory development is a situated process that takes place in a culturally structured environment, we may reasonably ask if implicit cultural biases may, in some cases, be responsible for maladaptive developmental niches. In this paper we wish to (...) argue for an affirmative answer. In order to do so, we first propose to conceptualize implicit bias as embodied perceptual habits, and then proceed to show that these habits are at least partially responsible for maladaptive developmental niches of children with Down syndrome and autism. With this framework we thus hope to bring together two fields of research that haven’t been explicitly connected: implicit bias and niche construction theory. Linking these two theories may bring benefits both to implicit bias researchers, who can extend this concept to characterize other sets of processes as biased, as well as to niche construction theorists, who will have a useful theoretical tool to diagnose maladaptive features of niches brought about by sociocultural biases. (shrink)

Tim Button explores the relationship between words and world; between semantics and scepticism. -/- A certain kind of philosopher – the external realist – worries that appearances might be radically deceptive. For example, she allows that we might all be brains in vats, stimulated by an infernal machine. But anyone who entertains the possibility of radical deception must also entertain a further worry: that all of our thoughts are totally contentless. That worry is just incoherent. -/- We cannot, then, be (...) external realists, who worry about the possibility of radical deception. Equally, however, we cannot be internal realists, who reject all possibility of deception. We must position ourselves somewhere between internal realism and external realism, but we cannot hope to say exactly where. We must be realists, for what that is worth, and realists within limits. -/- In establishing these claims, The Limits of Realism critically explores and develops several themes from Hilary Putnam’s work: the model-theoretic arguments; the connection between truth and justification; the brain-in-vat argument; semantic externalism; and conceptual relativity. The book establishes the continued significance of these topics for all philosophers interested in mind, logic, language, or the possibility of metaphysics. (shrink)

I advocate scepticism about epistemic blame; the view that we have good reason to think there is no distinctively epistemic form of blame. Epistemologists often find it useful to draw a distinction between blameless and blameworthy norm violation. In recent years, this has led several writers to develop theories of ‘epistemic blame.’ I present two challenges against the very idea of epistemic blame. First, everything that is supposedly done by epistemic blame is done by epistemic evaluation, at least according to (...) a prominent view about the social role of epistemic evaluation. Parsimony considerations count against introducing an idle mechanism that does the same work as an existing one. Second, no current theory of epistemic blame includes a plausible account of the force of epistemic blame or the practices that could express it. I conclude that we should give up the notion of epistemic blame. (shrink)

Higher‐order evidence can make an agent doubt the reliability of her reasoning. When this happens, it seems rational for the agent to adopt a cautious attitude towards her original conclusion, even in cases where the higher‐order evidence is misleading and the agent's original reasons were actually perfectly good. One may think that recoiling to a cautious attitude in the face of misleading self‐doubt involves a failure to properly respond to one's reasons. My aim is to show that this is not (...) so. My proposal is that (misleading) higher‐order evidence can undermine the agent's possession of her first‐order reasons, constituting what I call a dispossessing defeater. After acquiring the higher‐order evidence, the agent is no longer in a position to rely competently on the relevant first‐order considerations as reasons for her original conclusion, so that such reasons stop being available to her (even if they remain as strong as in the absence of the higher‐order evidence). In this way, an agent with misleading higher‐order evidence can adopt a cautious stance towards her original conclusion, while properly responding to the set of reasons that she possesses–a set that is reduced due to the acquisition of higher‐order dispossessing defeaters. (shrink)

People sometimes explain behavior by appealing to an essentialist concept of the self, often referred to as the true self. Existing studies suggest that people tend to believe that the true self is morally virtuous; that is deep inside, every person is motivated to behave in morally good ways. Is this belief particular to individuals with optimistic beliefs or people from Western cultures, or does it reflect a widely held cognitive bias in how people understand the self? To address this (...) question, we tested the good true self theory against two potential boundary conditions that are known to elicit different beliefs about the self as a whole. Study 1 tested whether individual differences in misanthropy—the tendency to view humans negatively—predict beliefs about the good true self in an American sample. The results indicate a consistent belief in a good true self, even among individuals who have an explicitly pessimistic view of others. Study 2 compared true self-attributions across cultural groups, by comparing samples from an independent country and a diverse set of interdependent countries. Results indicated that the direction and magnitude of the effect are comparable across all groups we tested. The belief in a good true self appears robust across groups varying in cultural orientation or misanthropy, suggesting a consistent psychological tendency to view the true self as morally good. (shrink)

The objective of this article is twofold. First, a methodological issue is addressed. It is pointed out that even if philosophers of mathematics have been recently more and more concerned with the practice of mathematics, there is still a need for a sharp definition of what the targets of a philosophy of mathematical practice should be. Three possible objects of inquiry are put forward: (1) the collective dimension of the practice of mathematics; (2) the cognitives capacities requested to the practitioners; (...) and (3) the specific forms of representation and notation shared and selected by the practitioners. Moreover, it is claimed that a broadening of the notion of ‘permissible action’ as introduced by Larvor (2012) with respect to mathematical arguments, allows for a consideration of all these three elements simultaneously. Second, a case from topology – the proof of Alexander’s theorem – is presented to illustrate a concrete analysis of a mathematical practice and to exemplify the proposed method. It is discussed that the attention to the three elements of the practice identified above brings to the emergence of philosophically relevant features in the practice of topology: the need for a revision in the definition of criteria of validity, the interest in tracking the operations that are performed on the notation, and the constant and fruitful back-and-forth from one representation to another in dealing with mathematical content. Finally, some suggestions for further research are given in the conclusions. (shrink)

Universals are putative objects like wisdom, morality, redness, etc. Although we believe in properties (which, we argue, are not a kind of object), we do not believe in universals. However, a number of ordinary, natural language constructions seem to commit us to their existence. In this paper, we provide a fictionalist theory of universals, which allows us to speak as if universals existed, whilst denying that any really do.

The aim of this article is to investigate the roles of commutative diagrams (CDs) in a specific mathematical domain, and to unveil the reasons underlying their effectiveness as a mathematical notation; this will be done through a case study. It will be shown that CDs do not depict spatial relations, but represent mathematical structures. CDs will be interpreted as a hybrid notation that goes beyond the traditional bipartition of mathematical representations into diagrammatic and linguistic. It will be argued that one (...) of the reasons why CDs form a good notation is that they are highly mathematically tractable: experts can obtain valid results by ‘calculating’ with CDs. These calculations, take the form of ‘diagram chases’. In order to draw inferences, experts move algebraic elements around the diagrams. It will be argued that these diagrams are dynamic. It is thanks to their dynamicity that CDs can externalize the relevant reasoning and allow experts to draw conclusions directly by manipulating them. Lastly, it will be shown that CDs play essential roles in the context of proof as well as in other phases of the mathematical enterprise, such as discovery and conjecture formation. (shrink)

The phenomenal character of perceptual experience involves the representation of colour, shape and motion. Does it also involve the representation of high-level categories? Is the recognition of a tomato as a tomato contained within perceptual phenomenality? Proponents of a conservative view of the reach of phenomenal content say ’No’, whereas those who take a liberal view of perceptual phenomenality say ’Yes’. I clarify the debate between conservatives and liberals, and argue in favour of the liberal view that high-level content can (...) directly inform the phenomenal character of perception. (shrink)

I defend the intention-dependence of artifacts, which says that something is an artifact of kind K only if it is the successful product of an intention to make an artifact of kind K. I consider objections from two directions. First, that artifacts are often mind- and intention-dependent, but that this isn’t necessary, as shown by swamp cases. I offer various error theories for why someone would have artifact intuitions in such cases. Second, that while artifacts are necessarily mind-dependent, they aren’t (...) necessarily intention-dependent. I consider and reject three kinds of cases which purport to show this: accidental creation, automated production, and mass production. I argue that intentions are present in all of these cases, but not where we would normally expect. (shrink)

Does DBS change a patient’s personality? This is one of the central questions in the debate on the ethics of treatment with Deep Brain Stimulation (DBS). At the moment, however, this important debate is hampered by the fact that there is relatively little data available concerning what patients actually experience following DBS treatment. There are a few qualitative studies with patients with Parkinson’s disease and Primary Dystonia and some case reports, but there has been no qualitative study yet with patients (...) suffering from psychiatric disorders. In this paper, we present the experiences of 18 patients with Obsessive-Compulsive Disorder (OCD) who are undergoing treatment with DBS. We will also discuss the inherent difficulties of how to define and assess changes in personality, in particular for patients with psychiatric disorders. We end with a discussion of the data and how these shed new light on the conceptual debate about how to define personality. (shrink)

Standard Type Theory, STT, tells us that b^n(a^m) is well-formed iff n=m+1. However, Linnebo and Rayo have advocated the use of Cumulative Type Theory, CTT, has more relaxed type-restrictions: according to CTT, b^β(a^α) is well-formed iff β > α. In this paper, we set ourselves against CTT. We begin our case by arguing against Linnebo and Rayo’s claim that CTT sheds new philosophical light on set theory. We then argue that, while CTT ’s type-restrictions are unjustifiable, the type-restrictions imposed by (...) STT are justified by a Fregean semantics. What is more, this Fregean semantics provides us with a principled way to resist Linnebo and Rayo’s Semantic Argument for CTT. We end by examining an alternative approach to cumulative types due to Florio and Jones; we argue that their theory is best seen as a misleadingly formulated version of STT. (shrink)

ABSTRACTA longstanding tradition in philosophy distinguishes between knowthatand know-how. This traditional “anti-intellectualist” view is soentrenched in folk psychology that it is often invoked in supportof an allegedly equivalent distinction between explicit and implicitmemory, derived from the so-called “standard model of memory.”In the last two decades, the received philosophical view has beenchallenged by an “intellectualist” view of know-how. Surprisingly, defenders of the anti-intellectualist view have turned to the cognitivescience of memory, and to the standard model in particular, todefend their view. Here, (...) I argue that this strategy is a mistake. As it turns out, upon closer scrutiny, the evidence from cognitivepsychology and neuroscience of memory does not support theanti-intellectualist approach, mainly because the standard modelof memory is likely wrong. However, this need not be interpretedas good news for the intellectualist, for it is not clear that theempirical evidence necessarily supp... (shrink)

Void is at the heart of Stoic metaphysics. As the incorporeal par excellence, being defined purely in terms of lacking body, it brings into sharp focus the Stoic commitment to non-existent Somethings. This article argues that Stoic void, far from rendering the Stoic system incoherent or merely ad hoc, in fact reflects a principled and coherent physicalism that sets the Stoics apart from their materialist predecessors and atomist neighbors.

Cognitivists and non-cognitivists in contemporary meta-ethics tend to assume that moral judgments are semantically uniform. That is, they share the assumption that either all moral judgments express beliefs, or they all express non-beliefs. But what if some moral judgments express beliefs and others do not? Then moral judgments are not semantically uniform and the question “Cognitivist or non-cognitivist?” poses a false dilemma. I will question the assumption that moral judgments are semantically uniform. First, I will explain what I mean by (...) the assumption (section 2). I will call this assumption SUM, the semantic uniformity of moral judgments. Second, I will provide some examples in order to illustrate that SUM cannot be taken for granted (section 3). Third, I will try to understand, using ideas from Wittgenstein, why SUM has nevertheless so often been taken for granted (section 4). Fourth, I will discuss some authors in contemporary meta-ethics who have noted the false dilemma between cognitivism and non-cognitivism and evaluate the solutions they propose for overcoming it (section 5). Fifth, I will indicate, again with some help from Wittgenstein, how meta-ethical research about moral judgments is possible without the assumption that morality is semantically uniform (section 6). (shrink)

Can a person be harmed or wronged by being brought into existence? Can a person be benefited by being brought into existence? Following David Heyd, I refer to these questions as “genethical questions”. This chapter examines three broad approaches to genethics: the no-faults model, the dual-benchmark model, and the parity model. The no-faults model holds that coming into existence is not properly subject to moral evaluation, at least so far as the interests of the person that is to be brought (...) into existence are concerned. The dual benchmark model allows that coming into existence can be subject to moral evaluation, but holds that our judgments about the kinds of lives worth starting ought not be aligned with our judgments about the kinds of lives worth sustaining. I argue against both the no-faults and dual benchmark models. In their place, I argue for a parity approach to genethics, according to which our judgments about the conditions under which life is worth creating ought to be constrained by our judgments about the conditions under which life is worth continuing. (shrink)

The aim of this article is to investigate specific aspects connected with visualization in the practice of a mathematical subfield: low-dimensional topology. Through a case study, it will be established that visualization can play an epistemic role. The background assumption is that the consideration of the actual practice of mathematics is relevant to address epistemological issues. It will be shown that in low-dimensional topology, justifications can be based on sequences of pictures. Three theses will be defended. First, the representations used (...) in the practice are an integral part of the mathematical reasoning. As a matter of fact, they convey in a material form the relevant transitions and thus allow experts to draw inferential connections. Second, in low-dimensional topology experts exploit a particular type of manipulative imagination which is connected to intuition of two- and three-dimensional space and motor agency. This imagination allows recognizing the transformations which connect different pictures in an argument. Third, the epistemic—and inferential—actions performed are permissible only within a specific practice: this form of reasoning is subject-matter dependent. Local criteria of validity are established to assure the soundness of representationally heterogeneous arguments in low-dimensional topology. (shrink)

We argue that S is in a position to know that p iff S can know that p. Thus, what makes position-to-know-ascriptions true is just a special case of what makes ability-ascriptions true: compossibility. The novelty of our compossibility theory of epistemic modality lies in its subsuming epistemic modality under agentive modality, the modality characterizing what agents can do.

One thing about technical artefacts that needs to be explained is how their physical make-up, or structure, enables them to fulfil the behaviour associated with their function, or, more colloquially, how they work. In this paper I develop an account of such explanations based on the familiar notion of mechanistic explanation. To accomplish this, I outline two explanatory strategies that provide two different types of insight into an artefact’s functioning, and show how human action inevitably plays a role in artefact (...) explanation. I then use my own account to criticize other recent work on mechanistic explanation and conclude with some general implications for the philosophy of explanation.Keywords: Artefact; Technical function; Explanation; Levels of explanation; Mechanisms. (shrink)

In this paper I claim that perceptual discriminatory skills rely on a suitable type of environment as an enabling condition for their exercise. This is because of the constitutive connection between environment and perceptual discriminatory skills, inasmuch as such connection is construed from an ecological approach. The exercise of a discriminatory skill yields knowledge of affordances of objects, properties, or events in the surrounding environment. This is practical knowledge in the first-person perspective. An organism learns to perceive an object by (...) becoming sensitized to its affordances. I call this position ecological disjunctivism. A corollary of this position is that a case of perception and its corresponding case of hallucination—which is similar to the former only in some respects—are different in nature. I show then how the distinguishability problem is addressed by ecological disjunctivism. (shrink)