We generalize the concept of Nash equilibrium in mixed strategies for strategic form games to allow for ambiguity in the players' expectations. In contrast to other contributions, we model ambiguity by means of so-called lower probability measures or belief functions, which makes it possible to distinguish between a player's assessment of ambiguity and his attitude towards ambiguity. We also generalize the concept of trembling hand perfect equilibrium. Finally, we demonstrate that for certain attitudes towards ambiguity it is possible to explain (...) cooperation in the one-shot Prisoner's Dilemma in a way that is in accordance with some recent experimental findings. (shrink)

This paper uses a two-dimensional version of a standard common consequence experiment to test the intransitivity explanation of Allais-paradox-type violations of expected utility theory. We compare the common consequence effect of two choice problems differing only with respect to whether alternatives are statistically correlated or independent. We framed the experiment so that intransitive preferences could explain violating behavior when alternatives are independent, but not when they are correlated. We found the same pattern of violation in the two cases. This is (...) evidence against intransitivity as an explanation of the Allais Paradox. The question whether violations of expected utility are mainly due to intransitivity or to violation of independence is important since it is exactly on this issue the main new decision theories differ. (shrink)

It is sometimes objected that anti-individualism, because of its assumption of the constitutive role of natural and social environments in the individuation of intentional attitudes, raises sceptical worries about first-person authority--that peculiar privilege each of us is thought to enjoy with respect to non-Socratic self-knowledge. Gary Ebbs believes that this sort of objection can be circumvented, if we give up metaphysical realism and scientific naturalism and adopt what he calls a “participant perspective” on our linguistic practices. Drawing on broadly Wittgensteinian (...) considerations, I argue that Ebbs is right about this, and I show how two likely objections to his view can be circumvented. I also argue that mere adoption of the participant perspective does not serve to refute external-world sceptic. (shrink)

Gary Ebbs shows that this appearance is illusory.

L’interrogation sur la nature de la référence, et plus généralement sur la relation entre notre langage et le monde, doit-elle prendre la forme d’une théorie scientifique, appelée à jouer un rôle central en philosophie? Ou bien, au contraire, ne peut-elle déboucher que sur les paradoxes quiniens de l’indétermination de la traduction et de l’inscrutabilité de la référence? Dans Truth and words (2009), Gary Ebbs rejette la première branche de l’alternative, tout en refusant le scepticisme de Quine. Cette discussion critique vise (...) à présenter cette œuvre exigeante. (shrink)

Utilizing a characterization of pragmatism drawn from Joseph Margolis, and with reference to the thought of C. S. Peirce and John Dewey, this paper first exposes a pragmatist conception of rationalitywithin the French philosophy of Maurice Merleau-Ponty. It then explores how this praxical, biologically rooted understanding of rationality leads Merleau-Ponty to espouse the same broadly pragmatistconception of ethical life that we find in arecent work from Joseph Margolis: one that repudiates fixed principles and absolute ends in order to prompt us, (...) under the pressing exigencies of life, to learn from radically different ways of thinking, thus committing us to negotiating peaceful solutions to our moral and political conflicts across diverse rational perspectives in a manner that, although taking us far from any form of objectivism, nevertheless refuses to renounce all claims to objectivity. (shrink)

Carnap, Quine, and Putnam held that in our pursuit of truth we can do no better than to start in the middle, relying on already-established beliefs and inferences and applying our best methods for re-evaluating particular beliefs and inferences and arriving at new ones. In this collection of essays, Gary Ebbs interprets these thinkers' methodological views in the light of their own philosophical commitments, and in the process refutes some widespread misunderstandings of their views, reveals the real strengths of their (...) arguments, and exposes a number of problems that they face. To solve these problems, in many of the essays Ebbs also develops new philosophical approaches, including new theories of logical truth, language use, reference and truth, truth by convention, realism, trans-theoretical terms, agreement and disagreement, radical belief revision, and contextually a priori statements. His essays will be valuable for a wide range of readers in analytic philosophy. (shrink)

Utilizing a characterization of pragmatism drawn from Joseph Margolis, and with reference to the thought of C. S. Peirce and John Dewey, this paper first exposes a pragmatist conception of rationalitywithin the French philosophy of Maurice Merleau-Ponty. It then explores how this praxical, biologically rooted understanding of rationality leads Merleau-Ponty to espouse the same broadly pragmatistconception of ethical life that we find in arecent work from Joseph Margolis: one that repudiates fixed principles and absolute ends in order to prompt us, (...) under the pressing exigencies of life, to learn from radically different ways of thinking, thus committing us to negotiating peaceful solutions to our moral and political conflicts across diverse rational perspectives in a manner that, although taking us far from any form of objectivism, nevertheless refuses to renounce all claims to objectivity. (shrink)

I offer a few thoughts about Nancy Stanlick's recently published monograph, American Philosophy: The Basics. While I take issue with a few details, such as a remark made about John Dewey’s understanding of metaphysics, I end with a note of appreciation. Stanlick’s decision to include ideas from sources not usually included in a philosophy book, whether one agrees with it or not, challenges readers to rethink, in a fresh and healthy way, what philosophy is and how it should be practiced.

John Dewey's metaphysics of experience has been criticized by a number of philosophers-most notably, George Santayana and Richard Rorty. While mainstream Dewey scholars agree that these critical treatments fail to treat the American Pragmatist theory of what exists on its own terms, there has still been some difficulty reaching consensus on what the casual reader should take away from the pages of Experience and Nature, Deweys seminal work on naturalistic metaphysics. So, how do we unearth the significance of Dewey's misunderstood (...) metaphysics? One way is for philosophers to look to spatial and social-cultural geographers for help. To fully grasp the movement of experience, these geographers recommend that we start with an experiential activity, such as touring. The activity of sea kayak touring, I contend, discloses the general movement of experience in Dewey's metaphysics between its primary and secondary phases. With this illustration and a closely connected metaphor, I demonstrate that Dewey's naturalized metaphysics can not only withstand the objections of the likes of Santayana and Rorty it can also assist us in gaining a deeper appreciation of the qualitative richness of our own day-to-day practices. (shrink)

According to the standard story W. V. Quine ’s criticisms of the idea that logic is true by convention are directed against, and completely undermine, Rudolf Carnap’s idea that the logical truths of a language L are the sentences of L that are true-in- L solely in virtue of the linguistic conventions for L, and Quine himself had no interest in or use for any notion of truth by convention. This paper argues that and are both false. Carnap did not (...) endorse any truth -by- convention theses that are undermined by Quine ’s technical observations. Quine knew this. Quine ’s criticisms of the thesis that logic is true by convention are not directed against a truth -by- convention thesis that Carnap actually held, but are part of Quine ’s own project of articulating the consequences of his scientific naturalism. Quine found that logic is not true by convention in any naturalistically acceptable sense. But he also observed that in set theory and other highly abstract parts of science we sometimes deliberately adopt postulates with no justification other than that they are elegant and convenient. For Quine such postulations constitute a naturalistically acceptable and fallible sort of truth by convention. It is only when an act of adopting a postulate is not indispensible to natural science that Quine sees it as affording truth by convention ‘unalloyed’. A naturalist who accepts Quine ’s notion of truth by convention is therefore not limited to accepting only those postulates that she regards as indispensible to natural science. (shrink)

Through detailed and trenchant criticism of standard interpretations of some of the key arguments in analytical philosophy over the last sixty years, this book ...

Analyzes the varied discourse on values and ethics. Addresses the need for self-scrutiny and explores leadership, the professoriate, and campus culture. Also examines academic integrity, freedom of speech, and the conflict between individual rights and the needs of the academic community.

In two previous papers I explained why I believe that a certain sort of argument that seems to support skepticism about self-knowledge is actually self-undermining, in the sense that no one can justifiably accept all of its premises at once. Anthony Brueckner has recently tried to show that even if the central premises of my explanation are true, the skeptical argument in question is not self-undermining. He has also suggested that even if the skeptical argument is self-undermining, it can still (...) serve as a _reductio ad absurdum of the assumption that we have self-knowledge. My goal in this paper is to explain why I think neither of these responses is successful. (shrink)

The Hilbert–Bernays Theorem establishes that for any satisfiable first-order quantificational schema S, one can write out linguistic expressions that are guaranteed to yield a true sentence of elementary arithmetic when they are substituted for the predicate letters in S. The theorem implies that if L is a consistent, fully interpreted language rich enough to express elementary arithmetic, then a schema S is valid if and only if every sentence of L that can be obtained by substituting predicates of L for (...) predicate letters in S is true. The theorem therefore licenses us to define validity substitutionally in languages rich enough to express arithmetic. The heart of the theorem is an arithmetization of Gödel's completeness proof for first-order predicate logic. Hilbert and Bernays were the first to prove that there is such an arithmetization. Kleene established a strengthened version of it, and Kreisel, Mostowski, and Putnam refined Kleene's result. Despite the later refinements, Kleene's presentation of th.. (shrink)

David Chalmers has recently argued that Bayesian conditionalization is a constraint on conceptual constancy, and that this constraint, together with “standard Bayesian considerations about evidence and updating,” is incompatible with the Quinean claim that every belief is rationally revisable. Chalmers’s argument presupposes that the sort of conceptual constancy that is relevant to Bayesian conditionalization is the same as the sort of conceptual constancy that is relevant to the claim that every belief is rationally revisable. To challenge this presupposition I explicate (...) a sort of “conceptual role” constancy that a rational subject could take to be necessary and sufficient for a rule of Bayesian conditionalization to govern her belief updating, and show that a rational subject may simultaneously commit herself to updating her beliefs in accord with such a rule and accept the claim that every belief is rationally revisable. (shrink)

Weltbekannte Wissenschaftshistoriker loben Petrićs Abhandlung über Ebbe und Flut, die Keppler bei seinem Formulierungsansatz des universalen Charakters der Gravitation als Grundlage diente. Die Unterschiede zwischen Ebbe und Flut in verschiedenen Meeren suchte Petrić im Rahmen seines Modells des Universums zu erklären . Er folgerte schlüssig, dass der Mond und die Sonne zwei allgemeine Ursachen von Ebbe und Flut sind , ohne dabei die Rolle der Gravitation zu erkennen. Vielmehr erklärte Petrić Ebbe und Flut in seinem eigenen (...) philosophischen System als eine Folge von Sonnen- und Wärmeeinwirkungen . Die Wissenschaft hat nach Petrić Ebbe und Flut als eine Auswirkung der Gravitation erklärt, bzw. als Folge der Raumzeitkrümmung . In dem Artikel soll die mathematische Beschreibung von Ebbe und Flut im Rahmen von Newtons Gravitationstheorie erklärt werden, aber auch die perfektere Ausrechnung derselben Erscheinung innerhalb der Raumzeitkrümmung gemäß der allgemeinen Relativitätstheorie im schwachen Gravitationsfeld . Die relativistische Korrektion für Ebbe und Flut fällt im Hinblick auf den klassischen Newton’schen Ausdruck geringfügig aus, wie es auch für schwache Gravitationsfelder zu erwarten ist. Weder Newtons noch Einsteins Theorie – so perfekt sie in der mathematischen Beschreibung von Ebbe und Flut auch sein mögen – beschreiben Ebbe und Flut so eingehend, wie es Petrić in seiner phänomenologischen Theorie getan hat, indem er den lokalen Charakter des Phänomens hervorhob. Auf vielen Symposien anlässlich des 100. Jubiläums des wundervollen Jahres 1905 wurde Einstein zum größten Physiker des 20. Jahrhunderts erklärt, neben Newton zum größten Physiker aller Zeiten. Umso mehr sollen Petrićs Verdienste gewürdigt werden, nicht nur in Bezug auf seine Theorie des mathematischen und physikalischen Raumes, sondern auch hinsichtlich seiner phänomenologischen Theorie von Ebbe und Flut, die Petrić, als ein unmittelbarer Vorgänger Kepplers und ganze 100 Jahre vor Newton, in sein interessantes philosophisches System der Beschreibung des Universums und der darin stattfindenden Naturerscheinungen eingebaut hat. (shrink)

In previous work I argued that skepticism about the compatibility ofanti-individualism with self-knowledge is incoherent. Anthony Brueckner isnot convinced by my argument, for reasons he has recently explained inprint. One premise in Brueckner's reasoning is that a person'sself-knowledge is confined to what she can derive solely from herfirst-person experiences of using her sentences. I argue that Brueckner'sacceptance of this premise undermines another part of his reasoning – hisattempt to justify his claims about what thoughts our sincere utterances ofcertain sentences would (...) express in various possible worlds. I describe aweird possible world in which a person who uses Brueckner's reasoning endsup with false beliefs about what thoughts her sincere utterances of certainsentences would express in various possible worlds. I recommend that wereject Brueckner's problematic conception of self-knowledge, and adopt onethat better fits the way we actually ascribe self-knowledge. (shrink)

Author's replies to an APA book symposium on "Carnap, Tarski, and Quine at Harvard.".

Philosophical Investigations, Volume 45, Issue 3, Page 373-380, July 2022.

Language users ordinarily suppose that they know what thoughts their own utterances express. We can call this supposed knowledge minimal self-knowledge. But what does it come to? And do we actually have it? Anti-individualism implies that the thoughts which a person's utterances express are partly determined by facts about their social and physical environments. If anti-individualism is true, then there are some apparently coherent sceptical hypotheses that conflict with our supposition that we have minimal self-knowledge. In this book, Anthony Brueckner (...) and Gary Ebbs debate how to characterize this problem and develop opposing views of what it shows. Their discussion is the only sustained, in-depth debate about anti-individualism, scepticism and knowledge of one's own thoughts, and will interest both scholars and graduate students in philosophy of language, philosophy of mind and epistemology. (shrink)