I endorse a 12-word metaphysics. [1] Stoff ist Kraft ≈ being is energy. [2] Wesen ist Werden ≈ being is becoming. [3] Sein ist Sosein ≈ being is qualit[ativit]y. [4] Ansichsein ist Fürsichsein ≈ being is mind. [1]–[3] are plausible metaphysical principles and unprejudiced consideration of what we know about concrete reality obliges us to favor [4], i.e. panpsychism or panexperientialism, above all other positive substantive proposals. For [i] panpsychism is the most ontologically parsimonious view, given that the existence of (...) conscious experience is certain and that panpsychism doesn’t posit the existence of any kind of stuff other than conscious experience. [ii] A question also arises about why metaphysicians have posited the existence of something for which there is zero evidence: non-experiential concrete reality. The question is the more pressing because of the silence of physics: physics with its numbers and equations is perfectly silent on the question of the intrinsic non-structural nature of reality. (shrink)

I argue against two popular claims. The first is a descriptive, empirical thesis about the nature of ordinary human experience: ‘each of us constructs and lives a “narrative” . . . this narrative is us, our identities’ (Oliver Sacks); ‘self is a perpetually rewritten story . . . in the end, we become the autobiographical narratives by which we “tell about” our lives’ (Jerry Bruner); ‘we are all virtuoso novelists. . . . We try to make all of our material (...) cohere into a single good story. And that story is our autobiography. The chief fictional char- acter . . . of that autobiography is one’s self’ (Dan Dennett). The second is a normative, ethical claim: we ought to live our lives narratively, or as a story; a ‘basic condition of making sense of ourselves is that we grasp our lives in a narrative’ and have an understanding of our lives ‘as an unfolding story’ (Charles Taylor). A person ‘creates his identity [only] by forming an autobiographical narrative – a story of his life’, and must be in possession of a full and ‘explicit narrative [of his life] to develop fully as a person’ (Marya Schechtman). (shrink)

The concept of alienation has been used to capture a specific kind of social ill or malady, and one that philosophers have argued is distinctive of life in modern society. I argue that there is a properly epistemic form of alienation present in modern society that arises due to a conflict between the dynamics of group knowledge and traditional requirements on the intellectual virtue of individuals. As group-based knowledge becomes increasingly widespread in modern society, the conflict with virtue becomes more (...) pervasive, and the virtuous become alienated from fundamental epistemic goods. The aim of this paper is to examine this conflict and to highlight that the ‘social turn’ in epistemology is not free from costs. (shrink)

The shortest form of the Basic Argument against free will and moral responsibility runs as follows: [1] When you act, you do what you do—in the situation in which you find yourself—because of the way you are. [2] If you do what you do because of the way you are, then in order to be fully and ultimately responsible for what you do you must be fully and ultimately responsible for the way you are. But [3] You cannot be fully (...) and ultimately responsible for the way you are. So [4] You cannot be fully and ultimately responsible for what you do. This paper restates the Basic Argument and varies it in several different ways. (shrink)

Suppose that X and Y can’t possibly exist apart in reality; then—by definition—there’s no real distinction between them, only a conceptual distinction. There’s a conceptual distinction between a rectilinear figure’s triangularity and its trilaterality, for example, but no real distinction. In fundamental metaphysics there is no real distinction between an object’s categorical properties and its dispositional properties. So too there is no real distinction between an object and its properties. And in fundamental metaphysics, for X and Y to be such (...) that there is no real distinction between them is for them to be identical. (shrink)

A new translation and edition of Aristotle's Protrepticus (with critical comments on the fragments) -/- Welcome -/- The Protrepticus was an early work of Aristotle, written while he was still a member of Plato's Academy, but it soon became one of the most famous works in the whole history of philosophy. Unfortunately it was not directly copied in the middle ages and so did not survive in its own manuscript tradition. But substantial fragments of it have been preserved in several (...) works by Iamblichus of Chalcis, a third century A.D. neo-Pythagorean philosopher and educator. On the basis of a close study of Iamblichus' extensive use and excerption of Aristotle's Protrepticus, it is possible to reconstruct the backbone of the lost work, and then to flesh it out with the other surviving reports about the work from antiquity (for example in Alexander of Aphrodisias and other ancient commentators on Aristotle). It is also possible to identify several papyrus fragments of the work, and many references and literary allusions in later authors, especially Cicero, whose own lost dialogue Hortensius was a defense of philosophy modeleld on Aristotle's. (shrink)

What does it mean to listen to someone respectfully, that is, insofar as they are due recognition respect? This paper addresses that question and gives the following answer: it is to listen in such a way that you are open to being surprised. A specific interpretation of this openness to surprise is then defended.

ABSTRACTMost of Spinoza’s arguments for God’s existence do not rely on any special feature of God, but instead on merely general features of substance. This raises the following worry: those arguments prove the existence of non-divine substances just as much as they prove God’s existence, and yet there is not enough room in Spinoza’s system for all these substances. I argue that Spinoza attempts to solve this problem by using a principle of plenitude to rule out the existence of other (...) substances and that the principle cannot be derived from the PSR, as many claim.Abbreviation: PSR: Principle of Sufficient Reason. (shrink)

In this article I introduce a simple classroom exercise intended to help students better understand Robert Nozick’s famous Wilt Chamberlain thought experiment. I outline the setup and rules of the Basic Version of the Game and explain its primary pedagogical benefits. I then offer several more sophisticated versions of the Game which can help to illustrate the difference between Nozick’s libertarianism and luck egalitarianism.

There is, of course, The Given: what is given in experience. The ‘Myth Of The Given’ is just a wrong answer to the question ‘What is given?’ This paper offers a brief sketch of three possible right answers. It examines an early account by Charles Augustus Strong of why The Myth is a myth. It maintains that a natural and naturalistic version of empiricism is compatible with the fact that the Myth is a myth. It gives proper place to enactivist (...) considerations. It is ) broadly in line with the Sellarsian view as refined by John McDowell. It meets an important constraint: acknowledging the reality of something that seems at first to lend support to The Myth—i.e. the fact that we can engage in ‘non-inferential self-attribution of … sensations’ —without in any way succumbing to the Myth. (shrink)

many things were back to front in 20th century analytic philosophy.

Short version of 'Real materialism', given at Tucson III Conference, 1998. (1) physicalism is true (2) the qualitative character of experience is real, as most naively understood ... so (3) the qualitative character of experience (considered specifically as such) is wholly physical. ‘How can consciousness possibly be physical, given what we know about the physical?’ To ask this question is already to have gone wrong. We have no good reason (as Priestley and Russell and others observe) to think that we (...) know anything about the physical that gives us any reason to find any problem in the idea that consciousness is wholly physical. (shrink)

This paper examines Spinoza’s view on the consistency of mental representation. First, I argue that he departs from Scholastic tradition by arguing that all mental states—whether desires, intentions, beliefs, perceptions, entertainings, etc.—must be logically consistent. Second, I argue that his endorsement of this view is motivated by key Spinozistic doctrines, most importantly the doctrine that all acts of thought represent what could follow from God’s nature. Finally, I argue that Spinoza’s view that all mental representation is consistent pushes him to (...) a linguistic account of contradiction. (shrink)

What is it that we are doing when we make ethical claims and judgments, such as the claim that we morally ought to assist refugees? This dissertation introduces and defends a novel theory of ethical thought and discourse. I begin by identifying the surface features of ethical thought and discourse to be explained, including the realist and cognitivist (i.e. belief-like) appearance of ethical judgments, and the apparent close connection between making a sincere ethical judgment and being motivated to act on (...) it. I examine prominent attempts to explain these features, with a focus on recent ‘hybrid’ theories combining elements of expressivism and cognitivism. Despite their initial promise, I argue that extant hybrid theories are nevertheless committed to problematic semantic, metasemantic, or pragmatic assumptions. I then discuss what I take to be the strongest existing option, ethical neo-expressivism (Bar-On and Chrisman, 2009; Bar-On, Chrisman, and Sias, 2014), and develop it into an explicitly hybrid theory proposing that ethical judgments incorporate both motivationally-charged affective states and moral beliefs. I then supplement this account with a theory of the proper function (following Millikan, 1984) of ethical claims and judgments, arguing that they function simultaneously to track the morally salient features of social situations, and to coordinate our behavior around these features. Finally, I defend one of the cognitivist commitments of the theory – namely, that objective moral knowledge is possible – by applying recent work on the epistemology of fundamental or ‘core’ intellectual commitments (Lynch, 2012; Pritchard, 2016) to the moral realm. (shrink)

Many students struggle to enter moral debates in a productive way because they automatically think of moral claims as ‘just opinions’ and not something one could productively argue about. Underlying this response are various versions of a muddled distinction between ‘facts’ and ‘opinions.’ This paper outlines a way to help students overcome their use of this distinction, thereby clearing an obstacle to true moral debate. It explains why the fact-opinion distinction should simply be scrapped, rather than merely sharpened. It then (...) proposes a different distinction well suited to replace it. Finally, it outlines an activity which can be used to teach the new distinction, as well as a number of benefits to attempting the whole replacement process. (shrink)

The possibilities of unconscious perception and unconscious bias prompt parallel debates about unconscious mental content. This chapter argues that claims within these debates alleging the existence of unconscious content are made fraught by ambiguity and confusion with respect to the two central concepts they involve: consciousness and content. Borrowing conceptual resources from the debate about unconscious perception, the chapter distills the two conceptual puzzles concerning each of these notions and establishes philosophical strategies for their resolution. It then argues that empirical (...) evidence for unconscious bias falls victim to these same puzzles, but that progress can be made by adopting similar philosophical strategies. Throughout, the chapter highlights paths forward in both debates, illustrates how they serve as fruitful domains in which to study the relationship between philosophy and empirical science, and uses their combined study to further understanding of a general theory of unconscious content. (shrink)

Plato’s partition argument infers that the soul has parts from the fact that the soul experiences mental conflict. We consider an ambiguity in the concept of mental conflict. According to the first sense of conflict, a soul is in conflict when it has desires whose satisfaction is logically incompatible. According to the second sense of conflict, a soul is in conflict when it has desires which are logically incompatible even when they are unsatisfied. This raises a dilemma: if the mental (...) conflict is supposed to be the latter kind of conflict, then the partition argument is valid but is likely unsound; if it’s supposed to be the former kind, then the partition argument has true premises but is invalid. We explain this dilemma in detail and defend a dispositionalist solution to it. (shrink)

People attribute resistance to bodies in Spinoza's physics. It's not always clear what they mean when they do this, or whether they are entitled to. This article clarifies what it would mean, and examines the evidence for attributing resistance. The verdict: there's some evidence, but not nearly as much as people think.

Spinoza reasons about impossibilities on a regular basis. But he also says they're unthinkable and that reasoning is a mental process. How can he do this? The paper defends a linguistic account of counterpossible inferences in Spinoza's geometrical method.

Using path-breaking discoveries of cognitive science, Mark Johnson argues that humans are fundamentally imaginative moral animals, challenging the view that morality is simply a system of universal laws dictated by reason. According to the Western moral tradition, we make ethical decisions by applying universal laws to concrete situations. But Johnson shows how research in cognitive science undermines this view and reveals that imagination has an essential role in ethical deliberation. Expanding his innovative studies of human reason in Metaphors (...) We Live By and The Body in the Mind, Johnson provides the tools for more practical, realistic, and constructive moral reflection. (shrink)

This paper argues that ability to do otherwise (in the compatibilist sense) at the moment of initiation of action is a necessary condition of being able to act at all. If the argument is correct, it shows that Harry Frankfurt never provided a genuine counterexample to the 'principles of alternative possibilities' in his 1969 paper ‘Alternate Possibilities and Moral Responsibility’. The paper was written without knowledge of Frankfurt's paper.

This paper endorses and expounds the widely held view that all experience involves pre-reflective self-consciousness or self-awareness. It argues that pre-reflective self-consciousness does not involve any sort of experience of ‘me-ness’ or ‘mine-ness’, and that all self-consciousness is essentially relational, essentially has the subject as intentional object, essentially involves representation, in particular self-representation, as well as ‘immediate acquaintance’, in particular immediate self-acquaintance; and cannot in one primordial respect involve a mistake on the part of the subject of who it is.

Archytas of Tarentum, a contemporary and associate of Plato, was a famous Pythagorean, mathematician, and statesman of Tarentum. Although his works are lost and most of the fragments attributed to him were composed in later eras, they nevertheless contain valuable information about his thought. In particular, the fragments of On Law and Justice are likely based on a work by the early Peripatetic biographer Aristoxenus of Tarentum. The fragments touch on key themes of early Greek ethics, including: written and unwritten (...) laws; freedom and self-sufficiency; moderation of the emotions and cultivation of virtues; equality and the competence of the majority to participate in government; criticism of “rule by an individual”; a theory of the ideal “mixed constitution”; distributive and corrective justice and punishment, and of the rule of law. The fragments also contain one of the only positive accounts of democracy in ancient Greek philosophy. (shrink)

An interruption. Rethinking the first three chapters of this book, I have come to suspect that, not unlike Iris Murdoch and Emmanuel Levinas, the way I imagine ‘ethics’ floats on an idea that any ethical substantive position or ethical theory is always shaped through our existential condition and our embodied encounter with others. To Murdoch, existence is the disposition for our responses to the ways in which we perceive reality, and yet, although these responses are always part of who we (...) are, they are not always part of what we do, and so, we set ourselves ethical tasks when we desire to act ethically. As scholar Bridget Clarke argues, “to attend to something [for Murdoch] is to approach it with a just and loving eye, and therewith to perceive it in its unbounded particularity and complexity, and so, as it truly is.” Or as I argue, to attend to the other ‘justly and lovingly’, Murdoch would instruct, is not merely to accurately collect details about the other and then arrive at an approximation of its being, but also to apprehend the other as ‘distinctly singular’ and ‘distinctly foreign’ from oneself–which at once forgoes any assimilation of the other into oneself, incidentally. The recognition of the other as ‘one who embodies human otherness and dignity’ becomes the condition for and coherent way of imagining and accessing moral reality. Moreover, for Diane Davis, this “being-for-the-other names a pre-originary obligation to respond to the other [and] it is in this response that both the self and the other emerge as existents” whose ethical projects are each challenged by the markedly different and infinitely other being. This obligation, Levinas might also say, is an ‘authority’ that is experienced like the effect of the other upon me, so that I am subsequently motivated to enact ethical task-making. I am not, therefore, “pulling everything other into the same, the known, the comprehended,” nor am I looking to any normative theories as authoritative templates from which I act ethically. And so, unlike Husserl, I am not “joining the philosophical tradition in its fundamental disrespect for all things other,” but instead, by dispositioning myself between these theories in responsible Levinasian fashion, I will be tracking them in response to their confronting me, and not as normative theories that are applicable to real and lived experiences. (shrink)

To Aaron Pacitti and Michael Cauvel–whose journal article, “Rent-Seeking Behavior and Economic Justice: A Classroom Exercise” broadly argues that “understanding the [complexities] of rent-seeking behavior helps fill the gap between economics and politics”–the varieties of rent are wide and, therefore, can only be described in their category-specific positions. I will discuss three of these categories in more detail below, but for now, I propose that a useful working grasp of economic rent involves “the amount paid to the owner of a (...) factor of production over the cost that is to be necessarily incurred on utilizing such elements in the production process.” In math terms, ‘economic rent’ equals the agreed-upon-amount paid by the consumer (when that amount far exceeds the market value of the product) minus the cost spent by the producer to make the product (when that cost is far below the typical amount to produce the product). Originally, the concept of economic rent concerned land ownership and the production of natural goods. Two major economists, Adam Smith and David Ricardo, offered insights into the general makeup and logic of what they called, the rent of land and simply rent, respectively. (shrink)

This study steps beyond the traditional arguments of feminism and examines homebirth from a libertarian perspective. It addresses the debate over homebirth and midwifery, which includes the use of direct-entry midwives as well as the philosophical implications of individual autonomy expressed through consumer choice. Furthermore, this paper demonstrates that the medical establishment gains economic and political control primarily through medical licensing, and uses the state to undermine personal freedom as it advances a government-enforced monopoly on birth. At the same time, (...) empirical studies have established a substantial record of high safety and low medical complication rates for homebirth as compared to hospital births. Ultimately, the state’s restriction on medical choices is incompatible with the nonaggression principle and voluntarism, and therefore, with libertarianism. (shrink)

A semantics is presented for Storrs McCall's separate axiomatizations of Aristotle's accepted and rejected polysyllogisms. The polysyllogisms under discussion are made up of either assertoric or apodeictic propositions. The semantics is given by associating a property with a pair of sets: one set consists of things having the property essentially and the other of things having it accidentally. A completeness proof and a semantic decision procedure are given.

Critics have alleged that Democritus’ ethical prescriptions (“gnomai”) are incompatible with his physics, since his atomism seems committed to necessity or chance (or an awkward combination of both) as a universal cause of everything, leaving no room for personal responsibility. I argue that Democritus’ critics, both ancient and contemporary, have misunderstood a fundamental concept of his causality: a cause called “spontaneity”, which Democritus evidently considered a necessary (not chance) cause, compatible with human freedom, of both atomic motion and human actions. (...) Some influential contemporary compatibilists have argued that freedom and responsibility are compatible with causal determinism, but not intentional constraint where some other agent is intentionally manipulating or coercing one’s actions. In line with this, Democritus holds that humans should not blame their actions on other agents like the gods, or agent-like external forces like fate or chance, but should assume ultimate intentional control over their own choices and actions. The famous remark of his associate Leucippus that “everything happens for a reason and out of necessity” is a fitting slogan of their atomistic philosophy, for Democritus pursued what can without anachronism be recognized as a causal theory of freedom. (shrink)

Arguments against our free will pose a serious problem. Although there are not very many philosophers who call themselves fatalists, quite a few are convinced that fatalism follows from common assumptions. Assuming that most believe themselves to be free, identifying ways to avoid the conclusion of such fatalist arguments is quite an important task. I begin by dealing specifically with theological fatalism. I present many versions of theological fatalism, but come to the conclusion that only one version constitutes a genuine (...) problem. That version, I argue, is reducible to a deeper fatalist dilemma that follows from assumptions so common that it must be faced by even the atheist: the mutually incompatibility of human freedom, the principle of alternate possibilities and bi-valance. After considering other objections to my argument, I conclude that the only way to avoid the fatalist conclusion is to either deny the principle of alternate possibilities or deny bi-valance. I argue that, although each option is somewhat problematic, denying bivalence is the more defensible of the two options. (shrink)

Counting functions are shown to be complete by using a simpler argument than that used by Pelletier and Martin.

Copi's method of deduction is formalized and shown to be complete.

Why is it that some instances of disagreement appear to be so intractable? And what is the appropriate way to handle such disagreements, especially concerning matters about which there are important practical and political needs for us to come to a consensus? In this paper, I consider an explanation of the apparent intractability of deep disagreement offered by hinge epistemology. According to this explanation, at least some deep disagreements are rationally unresolvable because they concern ‘hinge’ commitments that are unresponsive to (...) rational considerations. This explanation, if correct, seems to have troubling implications for how we should respond to deep disagreement. If my position on a topic is not responsive to rational considerations, then what choice have I but to dogmatically hold to that position, and simply dismiss the views of those with whom I disagree? I address this problem by identifying an attitude of intellectual humility that is appropriate to have towards one's hinge commitments, and suggest that this attitude provides the basis for a non-rational, constructive way to resolve deep disagreement. (shrink)

Authenticates approximately 500 lines of Aristotle's lost work the Protrepticus (Exhortation to Philosophy) contained in the circa third century AD work by Iamblichus of Chalcis entitled Protrepticus epi philosophian. Includes a complete English translation of the authenticated material.

As inductive decision-making procedures, the inferences made by machine learning programs are subject to underdetermination by evidence and bear inductive risk. One strategy for overcoming these challenges is guided by a presumption in philosophy of science that inductive inferences can and should be value-free. Applied to machine learning programs, the strategy assumes that the influence of values is restricted to data and decision outcomes, thereby omitting internal value-laden design choice points. In this paper, I apply arguments from feminist philosophy of (...) science to machine learning programs to make the case that the resources required to respond to these inductive challenges render critical aspects of their design constitutively value-laden. I demonstrate these points specifically in the case of recidivism algorithms, arguing that contemporary debates concerning fairness in criminal justice risk-assessment programs are best understood as iterations of traditional arguments from inductive risk and demarcation, and thereby establish the value-laden nature of automated decision-making programs. Finally, in light of these points, I address opportunities for relocating the value-free ideal in machine learning and the limitations that accompany them. (shrink)

The paper shows that for any invalid polysyllogism there is a procedure for constructing a model with a domain with exactly three members and an interpretation that assigns non-empty, non-universal subsets of the domain to terms such that the model invalidates the polysyllogism.

We live in a world that is increasingly shaped by and bathed in science, with most scientific progress occurring in the past century, and much of it in the past few decades. Yet, several authors have puz- zled over the observation that modern societies are also characterized by a high degree of belief in a variety of pseudoscientific claims that have been thoroughly debunked or otherwise discarded by scientists (Anonymous, 2001; Ede, 2000).

As artforms, film and street art seem incompatible. Contra this incompatibility, I investigate their combination: cinematic street art. Two promising cases are the artworks MUTO and Repopulate, but I argue neither is suitable. MUTO only counts if I accept the transparency thesis, the claim that photographs allow us to literally see their depicta. Repopulate only counts if we reject Noel Carroll’s requirement that a cinematic performance token isn’t itself an artwork. However, these imperfect cases demonstrate what is required in order (...) to have cinematic street art: the artwork is a 1) aconsensual artwork that 2) does not merely use street art as imagery or 3) merely use the street as a performance space. I introduce two hypothetical artworks inspired by this approach and discuss their merits, as well as their pitfalls relevant to my own desiderata. As such, this article serves as the foment for broader discussion within the philosophy of street art. (shrink)

Recent events have revived questions about the circumstances that ought to trigger therapists' duty to warn or protect. There is extensive interstate variation in duty to warn or protect statutes enacted and rulings made in the wake of the California Tarasoff ruling. These duties may be codified in legislative statutes, established in common law through court rulings, or remain unspecified. Furthermore, the duty to warn or protect is not only variable between states but also has been dynamic across time. In (...) this article, we review the implications of this variability and dynamism, focusing on three sets of questions: first, what legal and ethics-related challenges do therapists in each of the three broad categories of states (states that mandate therapists to warn or protect, states that permit therapists to breach confidentiality for warnings but have no mandate, and states that give no guidance) face in handling threats of violence? Second, what training do therapists and other professionals involved in handling violent threats receive, and is this training adequate for the task that these professionals are charged with? Third, how have recent court cases changed the scope of the duty? We conclude by pointing to gaps in the empirical and conceptual scholarship surrounding the duty to warn or protect. (shrink)

The genetic modification of pigs as a source of transplantable organs is one of several possible solutions to the chronic organ shortage. This paper describes existing ethical tensions in xenotransplantation (XTx) that argue against pursuing it. Recommendations for lifelong infectious disease surveillance and notification of close contacts of recipients are in tension with the rights of human research subjects. Parental/guardian consent for pediatric xenograft recipients is in tension with a child’s right to an open future. Individual consent to transplant is (...) in tension with public health threats that include zoonotic diseases. XTx amplifies concerns about justice in organ transplantation and could exacerbate existing inequities. The prevention of infectious disease in source animals is in tension with the best practices of animal care and animal welfare, requiring isolation, ethologically inappropriate housing, and invasive reproductive procedures that would severely impact the well-being of intelligent social creatures like pigs. (shrink)

An overview of the influence of Lucretius poem On the Nature of Things (De Rerum Natura) on the renaissance and scientific revolution of the seventeenth century, and an examination of its continuing influence over physical atomism in the nineteenth and twentieth centuries.

For an Aristotelian observer, the halo is a puzzling phenomenon since it is apparently sublunary, and yet perfectly circular. This paper studies Aristotle's explanation of the halo in Meteorology III 2-3 as an optical illusion, as opposed to a substantial thing (like a cloud), as was thought by his predecessors and even many successors. Aristotle's explanation follows the method of explanation of the Posterior Analytics for "subordinate" or "mixed" mathematical-physical sciences. The accompanying diagram described by Aristotle is one of the (...) earliest lettered geometrical diagrams, in particular of a terrestrial phenomenon, and versions of it can still be found in modern textbooks on meteorological optics. (shrink)

McCall's system for contingent syllogisms is modified. A semantics for the resulting system is provided.

Important advances in biomedical and behavioral research ethics have occurred over the past few decades, many of them centered on identifying and eliminating significant harms to human subjects of research. Comprehensive attention has not been paid to the totality of harms experienced by animal subjects, although scientific and moral progress require explicit appraisal of these harms. Science is a public good and the prioritizing within, conduct of, generation of, and application of research must soundly address questions about which research is (...) morally defensible and valuable enough to support through funding, publication, tenure, and promotion. Likewise, educational pathways of re-imagined science are critical. (shrink)

Aristotle's syllogistic is extended to include denumerably many quantifiers such as 'more than 2/3' and 'exactly 2/3.' Syntactic and semantic decision procedures determine the validity, or invalidity, of syllogisms with any finite number of premises. One of the syntactic procedures uses a natural deduction account of deducibility, which is sound and complete. The semantics for the system is non-classical since sentences may be assigned a value other than true or false. Results about symmetric systems are given. And reasons are given (...) for claiming that syllogistic validity is relevant validity. (shrink)

In twenty important passages located throughout De rerum natura, Lucretius refers to natural things happening spontaneously (sponte sua; the Greek term is automaton). The most important of these uses include his discussion of the causes of: nature, matter, and the cosmos in general; the generation and adaptation of plants and animals; the formation of images and thoughts; and the behavior of human beings and the development of human culture. In this paper I examine the way spontaneity functions as a cause (...) in other Greek and Latin writers, beginning with Homer and Hesiod, and including Herodotus, Thucydides, Xenophon, Plato, Aristotle, and Theophrastus; among Latin writers Cicero, Pliny, Horace, Vergil and Ovid. I argue that the most important influence (immediately or via Epicurus) on Lucretius’ concept and use of this cause is the natural philosophy of Democritus and his followers and critics. I argue that understanding the nature of spontaneity, and how it differs from chance, is crucial to understanding Lucretius’ account of the cosmos and nature, and also how some of the actions of humans and other animals are “free” and “voluntary”. For in the famous passage at II.251-293 he contrasts free action with action caused or constrained by external forces and outside influences. (shrink)