In The Logical Basis of Metaphysics, Dummett articulates and develops his “fundamental assumption” that the introduction rules for a logical constant determine its meaning. According to Dummett, logical laws in harmony with the introduction rules are justified, while logical laws not in harmony with the introduction rules are unjustified. This powerful picture enables Dummett to criticise certain aspects of our linguistic practice, such as the Law of Excluded Middle and the metaphysics of realism he believes it embodies, as not remaining (...) responsible to the meanings of the logical constants. Against Dummett's fundamental assumption, I bring to bear what in the Tractatus Wittgenstein describes as his “fundamental thought” that the logical constants do not represent. Properly understood, Wittgenstein's point is that since the logical constants may be eliminated from the propositional signs of a fully precise logical notation, the constants do not express meanings to which our use of expressions containing the constants is responsible. I then apply Wittgenstein's fundamental thought to Dummett's proof‐theoretic notation to show that far from determining the meanings of the logical constants, the introduction rules merely allow the constants to be edited from certain inferences, leaving Dummett with no semantic kernel with which to criticise other sentences or inferences featuring the constants. Thus, his picture of what it is to make clear the working of our language collapses. (shrink)

Using Martin Heidegger’s later philosophy as his springboard, Peter S. Dillard provides a radical reorientation of contemporary Christian theology. From Heidegger’s initially obscure texts concerning the holy, the gods, and the last god, Dillard extracts two possible non-metaphysical theologies: a theology of Streit and a theology of Gelassenheit. Both theologies promise to avoid metaphysical antinomies that traditionally hinder theology. After describing the strengths and weaknesses of each non-metaphysical theology, Dillard develops a Gelassenheit theology that ascribes a (...) definite phenomenology to the human encounter with divinity. This Gelassenheit theology also explains how this divinity can guide human action in concrete situations, remain deeply consonant with Christian beliefs in the Incarnation and the Trinity, and shed light on the Eucharist and Religious Vocations. Seminal ideas from Rudolf Otto and Ludwig Wittgenstein are applied at key points. Dillard concludes by encouraging others to develop an opposing Streit theology within the non-metaphysical, Heidegerrian framework he presents. (shrink)

I examine two arguments for the conclusion that thinking is not a physical process. James F. Ross argues that thinking is determinate in a manner that nopurely physical process can be. Peter Geach argues that thinking is a basic activity that, unlike basic physical processes, cannot be assigned a precise position in time. I present two objections to Ross’s argument. I then show that even if Geach’s argument avoids these objections, it is vulnerable to two other objections. I conclude (...) that neither argument establishes the immateriality of thinking. (shrink)

Deflationism about truth is the claim that the concept of truth is completely explicated by the disquotational view of truth, where the latter is the specification of a device of semantic ascent that avoids the semantical paradoxes. Over the last twenty years, the plausibility of deflationism has been intensely debated by philosophers of language. A number of writers have argued that even though deflationism is a coherent view, it is false. Some maintain that this is because a complete account of (...) truth must reduce truth to purely physical concepts but that the disquotational view of truth provides no such reduction. Others hold that there are important uses of the truth predicate that cannot be assimilated to its use as a device of semantic ascent. (shrink)

The Franciscan thesis maintains that the primary motive of the Incarnation is to glorify the triune God in the person of Jesus Christ: though Christ atones for human sins, his coming isn't relative to our need for redemption but rather has an absolute primacy. The Franciscan thesis is sometimes associated with the counterfactual claim that Christ would have come even if humans hadn't sinned. In recent work on the Franciscan thesis, an attempt is made to prove the counterfactual claim on (...) the basis of a purely logical argument drawn from the writings of Bl. John Duns Scotus. After showing that this proof fails, I construct an axiological argument for the Franciscan thesis that disentangles it from unsubstantiated counterfactual claims while respecting the subtle interplay between natural and revealed theology. I then provide a metaphysical interpretation of the axiological argument that builds upon Scotist notions. Seen through this interpretive lens, Scotus's logical argument can be understood not as attempting to prove a counterfactual claim but as articulating Scotus's vision of what is required of any created order that is radically contingent on God's will yet perfectly glorifies its Creator. Thus understood, the Franciscan thesis challenges a powerful and influential picture in philosophical theology. (shrink)

Philosophical Investigations, EarlyView.

Introduction -- Early Heidegger and scholasticism -- Heidegger's atheology of appropriation -- Heideggerian atheology and the Scotist causal argument -- Appropriation and the problem of sufficient comprehension -- Heidegger's atheology of nothingness -- Nothingness and the problem of possibility -- A positive application.

Mass incarceration has become a flashpoint in a number of recent political and public policy debates. Consensus about how to balance the just punishment of offenders with the humanitarian goal of providing inmates with genuine opportunities for reconciliation, rehabilitation, and reintegration into society is lacking. Unfortunately, a dualistic “us-versus-them” narrative surrounding these issues has become entrenched, occluding fruitful dialogue and obscuring our ability to see the detrimental effects that our nation’s punitive turn has created. In this essay, we affirm the (...) insights of Wacquant, Clear, and other sociologists and introduce a theological narrative of solidarity and vulnerability that undermines the “us-versus-them” dichotomy and opens up a path for cultivating a “we” community. (shrink)

Drawing upon Saul Kripke’s discussion of rules, James F. Ross deduces the immateriality of thinking from the metaphysical determinacy of thinking and the metaphysical indeterminacy of any physical process. It has been objected that Ross does not establish the metaphysical indeterminacy of what function a physical process realizes, that Ross does not show the incoherence of a highly deflationary view of our talk about thinking, and that Ross opens up an unbridgeable gulf between sui generis thinking and behavior. Edward Feser (...) has recently defended Ross’s argument from these objections. The present paper explains why Ross’s argument remains vulnerable to all three objections. (shrink)

Drawing upon Saul Kripke’s discussion of rules, James F. Ross deduces the immateriality of thinking from the metaphysical determinacy of thinking and the metaphysical indeterminacy of any physical process. It has been objected that Ross does not establish the metaphysical indeterminacy of what function a physical process realizes, that Ross does not show the incoherence of a highly deflationary view of our talk about thinking, and that Ross opens up an unbridgeable gulf between sui generis thinking and behavior. Edward Feser (...) has recently defended Ross’s argument from these objections. The present paper explains why Ross’s argument remains vulnerable to all three objections. (shrink)

The Didascalicon of Hugh of St. Victor encourages the study of many disciplines in order for the soul to acquire knowledge that aids in the restoration of human nature. However, according to Hugh's epistemology much of the acquired knowledge depends upon sensory qualities internalized as images which distract the soul and cause it to degenerate from its original unity. This essay explores the tension between Hugh's educational optimism and Hugh's epistemological pessimism. After considering and rejecting two unsuccessful strategies the soul (...) might pursue for avoiding degeneration and distraction, we shall utilize Hugh's non-representational conception of cognition to develop a plausible intellectual strategy. We shall also build upon some of Hugh's remarks about music to sketch a model of self-knowledge as a kind of proportionality in the soul. (shrink)

In his article “What Do We Think With?” Peter Geach develops an argument for the non-materiality of thinking. Given that basic thinking activity is not clockable in physical time, whereas basic material or bodily activity is so clockable, it follows that basic thinking activity is non-material. Peter Dillard’s attack on this temporality proof takes “thoughts” in the proof to refer to non-occurrent states. The present note shows this reading to be mistaken and so rectifies a misunderstanding of (...) Geach’s argument. It takes no stand on the question of whether the argument succeeds. (shrink)

James Ross developed a simple and powerful argument for the immateriality of the intellect, an argument rooted in the Aristotelian-Scholastic tradition while drawing on ideas from analytic philosophers Saul Kripke, W. V. Quine, and Nelson Goodman. This paper provides a detailed exposition and defense of the argument, filling out aspects that Ross left sketchy. In particular, it elucidates the argument’s relationship to its Aristotelian-Scholastic and analytic antecedents, and to Kripke’s work especially; and it responds to objections or potential objections to (...) be found in the work of contemporary writers like Peter Dillard, Robert Pasnau, Brian Leftow, and Paul Churchland. (shrink)

When do two sentences say the same thing, that is, express the same content? We defend two-component (2C) semantics: the view that propositional contents comprise (at least) two irreducibly distinct constituents, (1) truth-conditions, and (2) subject-matter. We contrast 2C with one-component (1C) semantics, focusing on the view that subject-matter is reducible to truth- conditions. We identify exponents of this view and argue in favor of 2C. An appendix proposes a general formal template for propositional 2C semantics.

This collection of vivid and eloquent testimonies by environmentalists, eco-theologians, and native peoples illustrates a variety of responses to the same universal question: Where are we as a species heading on this planet? Contributors include Rick Bass, Wendell Berry, Annie Dillard. Gretel Ehrlich, Barry Lopez, Peter Mattheisen, Thomas Moore, Terry Tempest Williams, and others.

We propose a solution to the problem of logical omniscience in what we take to be its fundamental version: as concerning arbitrary agents and the knowledge attitude per se. Our logic of knowledge is a spin-off from a general theory of thick content, whereby the content of a sentence has two components: an intension, taking care of truth conditions; and a topic, taking care of subject matter. We present a list of plausible logical validities and invalidities for the logic of (...) knowledge per se for arbitrary agents, and isolate three explanatory factors for them: the topic-sensitivity of content; the fragmentation of knowledge states; the defeasibility of knowledge acquisition. We then present a novel dynamic epistemic logic that yields precisely the desired validities and invalidities, for which we provide expressivity and completeness results. We contrast this with related systems and address possible objections. (shrink)

Our topic is the theory of topics. My goal is to clarify and evaluate three competing traditions: what I call the way-based approach, the atom-based approach, and the subject-predicate approach. I develop criteria for adequacy using robust linguistic intuitions that feature prominently in the literature. Then I evaluate the extent to which various existing theories satisfy these constraints. I conclude that recent theories due to Parry, Perry, Lewis, and Yablo do not meet the constraints in total. I then introduce the (...) issue-based theory—a novel and natural entry in the atom-based tradition that meets our constraints. In a coda, I categorize a recent theory from Fine as atom-based, and contrast it to the issue-based theory, concluding that they are evenly matched, relative to our main criteria of adequacy. I offer tentative reasons to nevertheless favour the issue-based theory. (shrink)

We explore some possibilities for developing epistemic logic using truthmaker semantics. We identify three possible targets of analysis for the epistemic logician. We then list some candidate epistemic principles and review the arguments that render some controversial. We then present the classic Hintikkan approach to epistemic logic and note—as per the ‘problem of logical omniscience’—that it validates all of the aforementioned principles, controversial or otherwise. We then lay out a truthmaker framework in the style of Kit Fine and present six (...) different ways of extending this semantics with a conditional knowledge operator, drawing on notions of implication and content that are prominent in Fine’s work. We demonstrate that different logics are thereby generated, bearing on the aforementioned epistemic principles. Finally, we offer preliminary observations about the prospects for each logic. (shrink)

Expressivists about epistemic modals deny that ‘Jane might be late’ canonically serves to express the speaker’s acceptance of a certain propositional content. Instead, they hold that it expresses a lack of acceptance. Prominent expressivists embrace pragmatic expressivism: the doxastic property expressed by a declarative is not helpfully identified with that sentence’s compositional semantic value. Against this, we defend semantic expressivism about epistemic modals: the semantic value of a declarative from this domain is the property of doxastic attitudes it canonically serves (...) to express. In support, we synthesize data from the critical literature on expressivism—largely reflecting interactions between modals and disjunctions—and present a semantic expressivism that readily predicts the data. This contrasts with salient competitors, including: pragmatic expressivism based on domain semantics or dynamic semantics; semantic expressivism à la Moss [2015]; and the bounded relational semantics of Mandelkern [2019]. (shrink)

In this paper, the author defends Peter van Inwagen’s modal skepticism. Van Inwagen accepts that we have much basic, everyday modal knowledge, but denies that we have the capacity to justify philosophically interesting modal claims that are far removed from this basic knowledge. The author also defends the argument by means of which van Inwagen supports his modal skepticism, offering a rebuttal to an objection along the lines of that proposed by Geirrson. Van Inwagen argues that Stephen Yablo’s recent (...) and influential account of the relationship between conceivability and possibility supports his skeptical claims. The author’s defence involves a creative interpretation and development of Yablo’s account, which results in a recursive account of modal epistemology, what the author calls the “safe explanation” theory of modal epistemology. (shrink)

"How do we go about weighing evidence, testing hypotheses and making inferences? According to the model of 'inference to the Best explanation', we work out what to inter from the evidence by thinking about what would actually explain that evidence, and we take the ability of a hypothesis to explain the evidence as a sign that the hypothesis is correct. In inference to the Best Explanation, Peter Lipton gives this important and influential idea the development and assessment it deserves." (...) "The second edition has been substantially enlarged and reworked, with a new chapter on the relationship between explanation and Bayesianism, and an extension and defence of the account of contractive explanation. It also includes an expanded defence of the claims that our inferences really are guided by diverse explanatory considerations, and that this pattern of inference can take us towards the truth. This edition of Inference to the Best Explanation has also been updated throughout and incudes a new bibliography."--BOOK JACKET. (shrink)

Single-premise epistemic closure is the principle that: if one is in an evidential position to know that P where P entails Q, then one is in an evidential position to know that Q. In this paper, I defend the viability of opposition to closure. A key task for such an opponent is to precisely formulate a restricted closure principle that remains true to the motivations for abandoning unrestricted closure but does not endorse particularly egregious instances of closure violation. I focus (...) on two brands of epistemic theory that naturally incorporate closure restrictions. The first type holds that the truth value of a knowledge ascription is relative to a relevant question. The second holds that the truth value of a knowledge ascription is relative to a relevant topic. For each approach, I offer a formalization of a leading theory from the literature and use this formalization to evaluate the theory’s adequacy in terms of a precise set of desiderata. I conclude that neither theory succeeds in meeting these desiderata, casting doubt on the viability of the underlying approaches. Finally, I offer a novel variant of the topic-sensitive approach that fares better. (shrink)

What does ‘Smith knows that it might be raining’ mean? Expressivism here faces a challenge, as its basic forms entail a pernicious type of transparency, according to which ‘Smith knows that it might be raining’ is equivalent to ‘it is consistent with everything that Smith knows that it is raining’ or ‘Smith doesn’t know that it isn’t raining’. Pernicious transparency has direct counterexamples and undermines vanilla principles of epistemic logic, such as that knowledge entails true belief and that something can (...) be true without one knowing it might be. I re-frame the challenge in precise terms and propose a novel expressivist formal semantics that meets it by exploiting (i) the topic-sensitivity and fragmentation of knowledge and belief states and (ii) the apparent context-sensitivity of epistemic modality. The resulting form of assertibility semantics advances the state of the art for state-based bilateral semantics by combining attitude reports with context-sensitive modal claims, while evading various objectionable features. In appendices, I compare the proposed system to Beddor and Goldstein’s ‘safety semantics’ and discuss its analysis of a modal Gettier case due to Moss. (shrink)

We investigate, in a logical setting, the expressivist proposal that assertion primarily functions to express and coordinate doxastic states and that ‘might’ fundamentally expresses lack of belief. We provide a formal model of an agent’s doxastic state and novel assertability conditions for an associated formal language. We thereby prove that an arbitrary assertion always succeeds in expressing a well-defined doxastic state, and propose a fully general and intuitive update operation as a model of an agent coming to accept an arbitrary (...) assertion. Leaving a comprehensive philosophical and linguistic defense for elsewhere, we explore technical aspects of our framework, providing, for instance, a complete logic of assertability and reduction axioms for the novel update operations related to our proposal. Finally, we contrast our work with related proposals in the logic literature. (shrink)

Drawing on the puzzling behavior of ordinary knowledge ascriptions that embed an epistemic (im)possibility claim, we tentatively conclude that it is untenable to jointly endorse (i) an unfettered classical logic for epistemic language, (ii) the general veridicality of knowledge ascription, and (iii) an intuitive ‘negative transparency’ thesis that reduces knowledge of a simple negated ‘might’ claim to an epistemic claim without modal content. We motivate a strategic trade-off: preserve veridicality and (generalized) negative transparency, while abandoning the general validity of contraposition. (...) We criticize various approaches to incorporating veridicality into domain semantics, a paradigmatic ‘information-sensitive’ framework for capturing negative transparency and, more generally, the non-classical behavior of sentences with epistemic modals. We then present a novel information-sensitive semantics that successfully executes our favored strategy: stable acceptance semantics, extending a vanilla bilateral state-based semantics for epistemic modals with a knowledge operator loosely inspired by the defeasibility theory of knowledge. (shrink)

Quine was one of the foremost philosophers of the Twentieth century. In this outstanding overview of Quine's philosophy, Peter Hylton shows why Quine is so important and how his philosophical naturalism has been so influential within analytic philosophy. Beginning with an overview of Quine's philosophical background in logic and mathematics and the role of Rudolf Carnap's influence on Quine's thought, he goes on to discuss Quine's famous analytic-synthetic distinction and his arguments concerning the nature of the a priori. He (...) also discusses Quine's philosophy of language and epistemology, his celebrated theory of the indeterminacy of translation and his broader views of ontology and modality. This book is essential reading for anyone interested in Quine, twentieth century philosophy and the philosophy of language. (shrink)

We examine a prominent naturalistic line on the method of cases, exemplified by Timothy Williamson and Edouard Machery: MoC is given a fallibilist and non-exceptionalist treatment, accommodating moderate modal skepticism. But Gettier cases are in dispute: Williamson takes them to induce substantive philosophical knowledge; Machery claims that the ambitious use of MoC should be abandoned entirely. We defend an intermediate position. We offer an internal critique of Macherian pessimism about Gettier cases. Most crucially, we argue that Gettier cases needn’t exhibit (...) ‘disturbing characteristics’ that Machery posits to explain why philosophical cases induce dubious judgments. It follows, we show, that Machery’s central argument for the effective abandonment of MoC is undermined. Nevertheless, we engineer a restricted variant of the argument—in harmony with Williamsonian ideology–that survives our critique, potentially limiting philosophy’s scope for establishing especially ambitious modal theses, despite traditional MoC’s utility being partially preserved. (shrink)

In our everyday lives we struggle with the notions of why we do what we do and the need to assign values to our actions. Somehow, it seems possible through experience and life to gain knowledge and understanding of such matters. Yet once we start delving deeper into the concepts that underwrite these domains of thought and actions, we face a philosophical disappointment. In contrast to the world of facts, values and morality seem insecure, uncomfortably situated, easily influenced by illusion (...) or ideology. How can we apply this same objectivity and accuracy to the spheres of value and morality? In the essays included in this collection, Peter Railton shows how a fairly sober, naturalistically informed view of the world might nonetheless incorporate objective values and moral knowledge. This book will be of interest to professionals and students working in philosophy and ethics. (shrink)

This far-reaching study redraws the intellectual map of the Enlightenment and boldly reassesses the legacy of that highly influential period for us today. Peter Hanns Reill argues that in the middle of the eighteenth century, a major shift occurred in the way Enlightenment thinkers conceived of nature that caused many of them to reject the prevailing doctrine of mechanism and turn to a vitalistic model to account for phenomena in natural history, the life sciences, and chemistry. As he traces (...) the ramifications of this new way of thinking through time and across disciplines, Reill provocatively complicates our understanding of the way key Enlightenment thinkers viewed nature. His sophisticated analysis ultimately questions postmodern narratives that have assumed a monolithic Enlightenment—characterized by the dominance of instrumental reason—that has led to many of the disasters of modern life. (shrink)