In this article, we present a definition of a hyperintensionality appropriate to relevant logics. We then show that relevant logics are hyperintensional in this sense, drawing consequences for other non-classical logics, including HYPE and some substructural logics. We further prove results concerning extensionality in relevant logics. We close by discussing related concepts for classifying formula contexts and potential applications of these results.

This article examines how facial recognition technology reshapes the philosophical debate over the ethics of video surveillance. When video surveillance is augmented with facial recognition, the data collected is no longer anonymous, and the data can be aggregated to produce detailed psychological profiles. I argue that – as this non-anonymous data of people’s mundane activities is collected – unjust risks of harm are imposed upon individuals. In addition, this technology can be used to catalogue all who publicly participate in political, (...) religious, and socially stigmatised activities, and I argue that this would undermine central interests of liberal democracies. I examine the degree to which the interests of individuals and the societal interests of liberal democracies to maintain people’s obscurity while in public coincide with privacy interests, as popularly understood, and conclude that there is a practical need to articulate a novel right to obscurity to protect the interests of liberal democratic societies. (shrink)

There appears to be few, if any, limits on what sorts of logical connectives can be added to a given logic. One source of potential limitations is the motivating ideology associated with a logic. While extraneous to the logic, the motivating ideology is often important for the development of formal and philosophical work on that logic, as is the case with intuitionistic logic. One family of logics for which the philosophical ideology is important is the family of relevant logics. In (...) this paper, I explore the limits of what a relevant connective is, showing how some basic criteria motivated by the ideology of relevant logicians provide robust limits on potential connectives. These criteria provide some plausible necessary conditions on being a relevant connective. (shrink)

Various theorists have endorsed the “communication argument”: communicative capacities are necessary for morally responsible agency because blame aims at a distinctive kind of moral communication. I contend that existing versions of the argument, including those defended by Gary Watson and Coleen Macnamara, face a pluralist challenge: they do not seem to sit well with the plausible view that blame has multiple aims. I then examine three possible rejoinders to the challenge, suggesting that a context-specific, function-based approach constitutes the most promising (...) modification of the communication argument. (shrink)

Few debates in environmental philosophy have been more heated than the one over the nature of wilderness. And yet, when one surveys the present scene, one finds that a variety of different conceptions of wilderness are still quite popular – some more so in certain professions than others. In this paper, I look at three popular conceptions of wilderness with an eye toward sussing out the good and the bad them. I look at what I call (1) the folk view (...) of wilderness, (2) Leopold’s conception of wilderness, and (3) the legal conception of wilderness (as found in the Wilderness Act of 1964). In the final part of the paper, I sketch out a sort of spectrum account of wilderness, one that I argue allows us to capture more cases of wilderness and might serve as a useful tool in future conservation efforts. (shrink)

An important question for proponents of non-contractive approaches to paradox is why contraction fails. Zardini offers an answer, namely that paradoxical sentences exhibit a kind of instability. I elaborate this idea using revision theory, and I argue that while instability does motivate failures of contraction, it equally motivates failure of many principles that non-contractive theorists want to maintain.

Environmental philosophy plays an important role, directly and indirectly, in many parts of society, including land and wildlife management (Leopold, 1949; Minteer, 2015), political activism (Abbey, 1968; Malm, 2020),and technological research and development (Baum & Owe, 2022; Donhauser et al., 2021). Environmental philosophy uncovers the ethical relationships existing between humans and the living and non-living world. It reveals the nuances of our scientific ecological concepts. And it tries to tell us how we might act – individually or collectively – to (...) better achieve our environmental goals. The aim of this special issue is to explore the limits and ever-expanding outer edges of this increasingly important area of philosophical thought. (shrink)

The operational semantics of Urquhart is a deep and important part of the development of relevant logics. In this paper, I present an overview of work on Urquhart’s operational semantics. I then present the basics of collection frames. Finally, I show how one kind of collection frame, namely, functional set frames, is equivalent to Urquhart’s semilattice semantics.

In classically based modal logic, there are three common conceptions of necessity, the universal conception, the equivalence relation conception, and the axiomatic conception. They provide distinct presentations of the modal logic S5, all of which coincide in the basic modal language. We explore these different conceptions in the context of the relevant logic R, demonstrating where they come apart. This reveals that there are many options for being an S5-ish extension of R. It further reveals a divide between the universal (...) conception of necessity on the one hand, and the axiomatic conception on the other: The latter is consistent with motivations for relevant logics while the former is not. For the committed relevant logician, necessity cannot be the truth in all possible worlds. (shrink)

It is widely agreed that reactive attitudes play a central role in our practices concerned with holding people responsible. However, it remains controversial which emotional attitudes count as reactive attitudes such that they are eligible for this central role. Specifically, though theorists near universally agree that guilt is a reactive attitude, they are much more hesitant on whether to also include shame. This paper presents novel arguments for the view that shame is a reactive attitude. The arguments also support the (...) view that shame is a reactive attitude in the sense that concerns moral accountability. The discussion thereby challenges both the view that shame is not a reactive attitude at all, suggested by philosophers such as R. Jay Wallace and Stephen Darwall, and the view that shame is a reactive attitude but does not concern moral accountability, recently defended by Andreas Carlsson and Douglas Portmore. (shrink)

In Saving Truth from Paradox, Hartry Field presents and defends a theory of truth with a new conditional. In this paper, I present two criticisms of this theory, one concerning its assessments of validity and one concerning its treatment of truth-preservation claims. One way of adjusting the theory adequately responds to the truth-preservation criticism, at the cost of making the validity criticism worse. I show that in a restricted setting, Field has a way to respond to the validity criticism. I (...) close with some general considerations on the use of revision-theoretic methods in theories of truth. (shrink)

In this paper, I motivate the addition of an actuality operator to relevant logics. Straightforward ways of doing this are in tension with standard motivations for relevant logics, but I show how to add the operator in a way that permits one to maintain the intuitions behind relevant logics. I close by exploring some of the philosophical consequences of the addition.

This paper sets upon the elaboration of two inter-related enquiries: What do being and otherness look like beyond the margins of metanarrativity? What would the crossing of such margins entail? It takes as its basic assumption that prejudice arises from out of the historicity of being. A thesis of prejudice as a pre-reflexive operation or heuristic of the understanding a subject employs in order to arrive upon the conscious inclination to intuit that p is presented. Furthermore, it is posited that (...) human understanding and rational inquiry are a fortiori grounded upon antecedent onto-phenomenological, hermeneutic and epistemic projects of being disclosed in metanarrativity. Metanarrativity, it is here maintained, constrains the horizon of intelligibility and truth in the discursive encounter of being with the “other” of alterity. It precludes the conditions of possibility for a non- prejudiced and value-neutral view in cross-cultural discourse. As such, it may be argued that an understanding of being and otherness cannot ascend the horizon of intelligibility without the sublating operation of prejudice. Prejudice, it is here argued, is sublating in the sense that it prefigures the possibilities for signification, subverting our interrogations from what is the state of affairs to mere intuitends of the form what it is like. Given that metanarrative discourses are invested in prejudice, it is therefore the task of decoloniality, set upon the cross-cultural discursive encounter between being and alterity, to take the physical appearance of an eschatology of liberation enacted in the everyday, performative praxis of non-domination. (shrink)

Relevant logics are a family of non-classical logics characterized by the behavior of their implication connectives. Unlike some other non-classical logics, such as intuitionistic logic, there are multiple philosophical views motivating relevant logics. Further, different views seem to motivate different logics. In this article, we survey five major views motivating the adoption of relevant logics: Use Criterion, sufficiency, meaning containment, theory construction, and truthmaking. We highlight the philosophical differences as well as the different logics they support. We end with some (...) questions for future research. (shrink)

A common refrain in and outside academia is that prominent sports figures ought to engage more in the public discourse about political issues. This idea parallels the idea that athletes ought to be role models in general. This paper first examines and critiques the “athlete as role model” argument and then applies this critique to the “athlete as political activist” argument. Appealing to the empirical political psychological literature, the paper sketches an argument that athlete activism might actually do more harm (...) than good. (shrink)

In this paper, I examine the ethics of nonviolent protest when a violent response is either foreseen or intended. One central concern is whether protesters, who foresee a violent response but persist, are provoking the violence and whether they are culpable for any eventual harms. A second concern is whether it is permissible to publicize the violent response for political advantage. I begin by distinguishing between two senses of the term provoke: a normative sense where a provocateur knowingly imposes an (...) unjustified risk of a violent response, and a descriptive sense where the respondent feels provoked. I argue that, when the risk of a violent response is justified, the protesters are not provocateurs but akin to nonculpable, entrapping agents who create an opportunity for the regime to respond with disproportionate violence. The regime’s response can disclose its brutality or criminality and this can be fairly publicized for political advantage. When nonviolent protesters create an unjustified risk of violence either because the injustice they oppose is insufficient to justify the risk of a violent response or because the risked harms are disproportionate with the likely political advantages derived from the protest, they are partially culpable provocateurs. However, I argue these partially culpable provocateurs can still permissibly publicize the disproportionate violence of the regime so as to shape public opinion. (shrink)

When asked which of our concepts are normative concepts, metaethicists would be quick to list such concepts as GOOD, OUGHT, and REASON. When asked why such concepts belong on the list, metaethicists would be much slower to respond. Matti Eklund is a notable exception. In his recent book, Choosing Normative Concepts, Eklund argues by elimination for “the Normative Role view” that normative concepts are normative in virtue of having a “normative role” or being “used normatively”. One view that Eklund aims (...) to eliminate is “the Metaphysical view” that normative concepts are normative in virtue of referring to normative properties. In addition to arguing that Eklund’s objection looks doubtful by its own lights, we argue that there are several plausible versions of the Metaphysical view that Eklund doesn’t eliminate, defending various claims about normative concepts and their relationships to deliberation, competence, reference, and possession along the way. (shrink)

We argue that distinct conditionals—conditionals that are governed by different logics—are needed to formalize the rules of Truth Introduction and Truth Elimination. We show that revision theory, when enriched with the new conditionals, yields an attractive theory of truth. We go on to compare this theory with one recently proposed by Hartry Field.

In this article, I analyze how the Harry Potter novels bring to awareness two fundamental aspects of the human condition: the importance of one’s choices and the inevitability of one’s mortality. These are highlighted through the contrast of the characters of Harry Potter and Lord Voldemort.

We present a new frame semantics for positive relevant and substructural propositional logics. This frame semantics is both a generalisation of Routley–Meyer ternary frames and a simplification of them. The key innovation of this semantics is the use of a single accessibility relation to relate collections of points to points. Different logics are modeled by varying the kinds of collections used: they can be sets, multisets, lists or trees. We show that collection frames on trees are sound and complete for (...) the basic positive distributive substructural logic $\mathsf {B}^+$, that collection frames on multisets are sound and complete for $\mathsf {RW}^+$ (the relevant logic $\mathsf {R}^+$, without contraction, or equivalently, positive multiplicative and additive linear logic with distribution for the additive connectives), and that collection frames on sets are sound for the positive relevant logic $\mathsf {R}^+$. The completeness of set frames for $\mathsf {R}^+$ is, currently, an open question. (shrink)

Analytic Philosophy, Volume 63, Issue 1, Page 16-27, March 2022.

This paper has two aims. First, it sets out an interpretation of the relevant logic E of relevant entailment based on the theory of situated inference. Second, it uses this interpretation, together with Anderson and Belnap’s natural deduc- tion system for E, to generalise E to a range of other systems of strict relevant implication. Routley–Meyer ternary relation semantics for these systems are produced and completeness theorems are proven. -/- .

This paper defends “Animal Universalism,” the thesis that all sentient non-human animals will be brought into Heaven and remain there for eternity. It assumes that God exists and is all-powerful, perfectly loving, and perfectly just. From these background theses, the authors argue that Animal Universalism follows. If God is perfectly loving, then God is concerned about the well-being of non-human animals, and God chooses to maximize the well-being of each individual animal when doing so does not harm other individual creatures (...) or violate creaturely freedom. If God is perfectly just, then God does not arbitrarily discriminate against non-human animals by offering humans an opportunity to enter Heaven but not offering the same to each animal. Each of these conclusions implies Animal Universalism. (shrink)

This paper examines Gandhian philosophy and practice to reinterpret UNESCO's educational vision towards establishing stable and sustainable knowledge societies. The uniqueness of the Gandhian perspective is its ability to withstand the dominant political, philosophical and religious challenges with its contextually rooted, spiritually oriented, socially responsible and human person centred reinterpretations. UNESCO’s educational vision-Learning: The Treasure Within published in 1996 is a catalyst in establishing stable and sustainable knowledge societies. Consistent changes and challenges in knowledge societies necessitates the reinterpretation of this (...) educational vision. The four pillars of learning in this educational vision are analysed together with four aspects of Gandhian philosophy and practice: ‘learning to know’ and Nai Talim, ‘learning to do’ and ashrams, ‘learning to live together’ and constructive programme and ‘learning to be’ and swaraj. The paper discusses this confluence of the UNESCO’s theoretical approach of four pillars of education with Gandhian pragmatic philosophy and practice to offer a contextually rooted and future-oriented outlook for reinterpreting the educational vision for establishing stable and sustainable knowledge societies. (shrink)

The study of biodiversity spans many disciplines and includes data pertaining to species distributions and abundances, genetic sequences, trait measurements, and ecological niches, complemented by information on collection and measurement protocols. A review of the current landscape of metadata standards and ontologies in biodiversity science suggests that existing standards such as the Darwin Core terminology are inadequate for describing biodiversity data in a semantically meaningful and computationally useful way. Existing ontologies, such as the Gene Ontology and others in the Open (...) Biological and Biomedical Ontologies (OBO) Foundry library, provide a semantic structure but lack many of the necessary terms to describe biodiversity data in all its dimensions. In this paper, we describe the motivation for and ongoing development of a new Biological Collections Ontology, the Environment Ontology, and the Population and Community Ontology. These ontologies share the aim of improving data aggregation and integration across the biodiversity domain and can be used to describe physical samples and sampling processes (for example, collection, extraction, and preservation techniques), as well as biodiversity observations that involve no physical sampling. Together they encompass studies of: 1) individual organisms, including voucher specimens from ecological studies and museum specimens, 2) bulk or environmental samples (e.g., gut contents, soil, water) that include DNA, other molecules, and potentially many organisms, especially microbes, and 3) survey-based ecological observations. We discuss how these ontologies can be applied to biodiversity use cases that span genetic, organismal, and ecosystem levels of organization. We argue that if adopted as a standard and rigorously applied and enriched by the biodiversity community, these ontologies would significantly reduce barriers to data discovery, integration, and exchange among biodiversity resources and researchers. (shrink)

Aworkshop was held August 26–28, 2015, by the Earth- Life Science Institute (ELSI) Origins Network (EON, see Appendix I) at the Tokyo Institute of Technology. This meeting gathered a diverse group of around 40 scholars researching the origins of life (OoL) from various perspectives with the intent to find common ground, identify key questions and investigations for progress, and guide EON by suggesting a roadmap of activities. Specific challenges that the attendees were encouraged to address included the following: What key (...) questions, ideas, and investigations should the OoL research community address in the near and long term? How can this community better organize itself and prioritize its efforts? What roles can particular subfields play, and what can ELSI and EON do to facilitate research progress? (See also Appendix II.) The present document is a product of that workshop; a white paper that serves as a record of the discussion that took place and a guide and stimulus to the solution of the most urgent and important issues in the study of the OoL. This paper is not intended to be comprehensive or a balanced representation of the opinions of the entire OoL research community. It is intended to present a number of important position statements that contain many aspirational goals and suggestions as to how progress can be made in understanding the OoL. The key role played in the field by current societies and recurring meetings over the past many decades is fully acknowledged, including the International Society for the Study of the Origin of Life (ISSOL) and its official journal Origins of Life and Evolution of Biospheres, as well as the International Society for Artificial Life (ISAL). (shrink)

Commentary on Shawn Thompson's "Supporting Ape Rights". My response to Wise’s and Thompson’s strategy is two-fold: 1) personhood is neither strictly deter-mined by cognitive facts nor fruitfully construed in Kantian terms, and 2) personhood is not what matters when it comes to animal protection. To conclude, 3) I hint at an alternative, or complementary, avenue for change.

An adequate semantics for generic sentences must stake out positions across a range of contested territory in philosophy and linguistics. For this reason the study of generic sentences is a venue for investigating different frameworks for understanding human rationality as manifested in linguistic phenomena such as quantification, classification of individuals under kinds, defeasible reasoning, and intensionality. Despite the wide variety of semantic theories developed for generic sentences, to date these theories have been almost universally model-theoretic and representational. This essay outlines (...) a range of proof-theoretic analyses for characterizing generics. Particular attention is given to an expressivist proof-theory that can be traced to 1) work on logical syntax that Carnap undertook prior to his turn toward truth-conditional model theory in the late 1930s, and 2) research on sequent calculi and natural deduction systems that originate in work from Gentzen and Prawitz.11 This essay offers a more precise exposition of some of the material discussed in the first two chapters of my dissertation (Stovall Citation2015a). These ideas developed in the context of a working group on non-monotonic logic run by Robert Brandom, and they were subsequently clarified through the work of Nissim Francez (particularly Francez Citation2015). I am indebted to many people for feedback and criticism on this essay, though I am sure none among them would agree with everything I say and do here. I would particularly like to thank Brandom, Francez, Ulf Hlobil, Daniel Kaplan, Jared Millson, Bernhard Nickel, Jaroslav Peregrin, Jeffry Pelletier, Thomas Ricketts, Mark Risjord, Shawn Standefer, and two reviewers for this journal. Work on this essay was supported by the joint Lead-Agency research grant between the Austrian Science Foundation (FWF) and the Czech Science Foundation (GAČR), Inferentialism and Collective Intentionality, GF17-33808L. It was substantially revised prior to its final submission. (shrink)

Although Paul Churchland and Jerry Fodor both subscribe to the so-called theory-theory– the theory that folk psychology (FP) is an empirical theory of behavior – they disagree strongly about FP’s fate. Churchland contends that FP is a fundamentally flawed view analogous to folk biology, and he argues that recent advances in computational neuroscience and connectionist AI point toward development of a scientifically respectable replacement theory that will give rise to a new common-sense psychology. Fodor, however, wagers that FP will be (...) largely preserved and vindicated by scientific investigations of behavior. Recent findings by developmental psychologists, I argue, will push both Churchlandians and Fodorians toward the pessimistic view that FP is a misguided theory that will never be displaced, because it is, so to speak, built into our cognitive systems. I explore the possibility of preserving optimism by rejecting the theory-theory and adopting the simulation theory, a competing view developed by Robert Gordon, Alvin Goldman, and Jane Heal. According to simulationists, common-sense interpretation of behavior is accomplished by means of pretense-like operations that deploy the cognitive system’s own reasoning capabilities in a disengaged manner. Since on this view no theory-like set of principles would be needed, the simulation theory seems to enjoy a simplicity advantage over the theory-theory. Steven Stich and Shawn Nichols, however, contend that as the cognitive system would require special mechanisms for disengaged operation, the simplicity question cannot be resolved until suitable computational models are developed. I describe a set of models I have constructed to meet this need, and I discuss the contribution such models can make to determining FP’s fate. (shrink)

I argue for the possibility of a proprioceptive art in addition to, for example, visual or auditory arts, where aspects of some martial arts will serve as examples of that art form. My argument is inspired by a thought of Ted Shawn’s, one of the pioneers of American modern dance: "Dance is the only art wherein we ourselves are the stuff in which it is made.” In a first step, I point out that in some practices of martial arts (...) (in the paper I will introduce “hyongs” & “katas”), we are, too, the stuff these performances are made of. Second, I show that we, as martial arts practitioners, are not in the first place visual or auditorial observers (as common in painting or music or ballet) but introspective, proprioceptive perceivers of our bodies and their movements. (As a corollary we get that we are, in such a case, necessarily our exclusive audience.) In an third crucial step, I show that the martial arts practices referred to, hyongs & katas, and especially the proprioceptive aspects thereof, can indeed count as art. Thus, proprioceptive art is possible because some practices of some martial arts are actual existing examples of that art form. (shrink)

This essay undertakes a phenomenological inquiry into the ‘experiential structure of hip-hop’ – a structure that hip-hop artist Jay-Z (Shawn Carter) gestures towards in his text Decoded. In this book, Jay-Z argues that hip-hop has a particular power to act as the vehicle for the communication of a specific type of experience, i.e. contradictory experiences, or those which do not seem possible under the principle of non-contradiction. For instance, Tupac Shakur says of his mom that “…even as a crack (...) fiend, mama / You always was a Black Queen, mama.” The way in which hip-hop is a powerful vehicle for this communication lies, according to Jay-Z, in its very structure, which he describes using two sets of terms: rhythm/flow and music/rhyme. Using Jay-Z’s general outline, this essay attempts to complete a phenomenological analysis of hip-hop, in the effort to (1) isolate the experiential structure of hip-hop and (2) isolate, within this structure, the way in which hip-hop is able to communicate contradictory experiences. In the final analysis, the author isolates the experiential structure of hip-hop and shows how its multiple layers work to draw listeners in and induce them to experience-with the artist. (shrink)

Heidegger Anmerkungen I-V (Schwarze Hefte 1942-1948): An Index / By Daniel Fidel Ferrer ©Daniel Fidel Ferrer, 2017. Pages 1-401. Note: the entire GA 97 is indexed. -/- Cover art by Shawn Rodriguez. -/- 1. Heidegger, Martin, -- 1889-1976. 2. Heidegger, Martin, -- 1889-1976 -- Concordances. 3. Heidegger, Martin, -- 1889-1976 -- Indexes. 4). Metaphysics. 5). Philosophy, German. 6). Heidegger, Martin; -- Table of Contents -/- 1). Preface and Introduction. 2). Background. 3). Main Index (pages, 20 to 401). -/- Motto (...) At the beginning of Remarks IV in this volume Heidegger quotes Gottfried Wilhelm Leibniz with the sentence (GA 97, e-text page 329, printed text page 325): -/- "Qui me non nisi editis novit, non me novit." -/- "He who knows me only from my publications does not know me.” -/- GA 97. Anmerkungen I-V (Schwarze Hefte 1942 1948), editor Peter Trawny 2015, 528 pages. [Starts on page 1 of this e-text .pdf file volume for indexing]. The e-text Ends on page 531. -/- . (shrink)

Copyright©Daniel Fidel Ferrer, 2018. 1. Heidegger, Martin, -- 1889-1976. 2. Heidegger, Martin, -- 1889-1976 -- Concordances. 3. Heidegger, Martin, -- 1889-1976 -- Indexes. 4). Metaphysics. 5). Philosophy, German. 6). Philosophy, German – Greek influences. 7). Heidegger, Martin; -- Wörterbuch. 8). Ontology. 9). Heidegger, Martin, -- 1889-1976 -- Concordances. 10). Heidegger, Martin, 1889–1976—Homes and haunts— Germany—Todtnauberg. I. Ferrer, Daniel Fidel, 1952-. Language: English (Preface and Introduction). Language: German (Main Index). Includes bibliographical references. Cover graphics by Shawn Rodriguez. Motto At the (...) beginning of a section in GA 97. Anmerkungen I-V (Schwarze Hefte 1942 1948), Martin Heidegger (1889-1976) quotes Gottfried Wilhelm Leibniz (1646- 1716) with the sentence (GA 97, e-text page 329, printed text page 325): "Qui me non nisi editis novit, non me novit." "He who knows me only from my publications does not know me.” Table of Contents 1). Preface and Introduction. 2). Outline of main manuscripts (in German). 3). Main Index (in German). An Index to Martin Heidegger’s (1889-1976) two printed volumes Zum Ereignis Denken; Gesamtausgabe Volumes GA 73.1 and GA 73.2 (published in October 2013 by Verlag Vittorio Klosterman). This Preface and Introduction to the Main Index are mostly written in English. Nevertheless, the Main Index is an index to a volume Gesamtausgabe GA 73.1 and 73.2 of Martin Heidegger's collected writings and that text is in German. Note: this is only an index and does not include the actual text of Zum Ereignis-Denken (GA73.1-2), because that book is protected under current copyright law. The actual printed two volume ends with page 1496 (GA 73.2). The entire book is listed under six (I to VI) main headings in the two printed volumes (Zum Ereignis-Denken (GA73.1-2). The six main headings from the table of contents are: Zu Ereignis I. Zerklüftung und ἀλήθεια Zerklüftung des Seins. Zu Ereignis II. Die Seinsfrage und das Ereignis. Zu Ereignis III. Das Da-sein. Zu Ereignis IV. Wesen des Entwurfs – Vorgehen. Zu Ereignis V. Abschied. Eine Reihe von Manuskripten zum Ereignis (1943-1945) Zu Ereignis VI. Ontologische Differenz und Unterschied . (shrink)

Arriving at definitions in philosophy is as time-honored as it is controversial. Although learned reflection in the west about sport goes back at least to the time of ancient Greece, the sub-discipline of the philosophy of sport emerged in the world of Anglophone analytic philosophy in the 1970s. Shawn Klein’s edited volume, Defining Sport: Conceptions and Borderlines, is both the fruit of and a valuable contribution to such an emerging field (indeed, it is the first book-length study of its (...) topic within philosophy of sport). Although Huizinga had sought to define the phenomenon of play very broadly in his Homo Ludens (1938), investigation of the overlapping questions of what is sport? what is a game?, and what is play? were central to the sub-discipline at its inception. Foundational was the work of Bernard Suits, whose Grasshopper: Games, Life, and Utopia (1978) sought to refute Wittgenstein’s claim that the notion of game was indefinable. In order to refute Wittgenstein, Suits sought to establish the conditions or properties both necessary and sufficient of the concepts of game and sport such that all instances of those concepts share such properties. (shrink)