Nominalism in Mathematics - Modality and Naturalism James S.J
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Naturalism and the a Priori Penelope Maddy
5 Naturalism and the A Priori PenelopeMaddy The naturalism I aim to practise is a descendantof Quine's. I My goal here is to place this naturalism in what I hope to be an illuminating historical context, to trace the status of the a priori through its various twists and turns, and eventu- ally to draw some tentative conclusions about the naturalistic status of the a priori. To do this, I first return to Kant. While it's surely no surprise that an examination of the a priori should start from Kant, perhapshis relevanceto natu- ralism is less obvious. Let me begin, then, with an introductory word on that connection. Though my naturalism differs from Quine's in a couple of significant ways, these disagreements won't matter until the very end. so we can begin with Quine's leading idea: the 'abandonmentof the goal of a first philosophy' (Quine 1975: 72). The interconnectionsbetween Quine and Carnap will take centre stage later, but for now we needonly note that the bare rejection of first philosophy can be seen as evolving out of Carnap's classification of many traditional metaphys- ical claims as 'pseudo-statement[s] without cognitive content' (Carnap 1950: 250). Carnap's idea is that legitimate scientific questions, 'theoretical questions', are asked within the linguistic framework of scientific language,with its associ- ated principles of evidence; in contrast, metaphysical pseudo-questionsare posed outside of all linguistic frameworks; perhaps as preamble to the adoption of a linguistic framework, as such, they are asked without the backing of associated evidential rules that would make them answerable,and indeed, that would give them sense. -
Jody Azzouni
ON “ON WHAT THERE IS”* BY JODY AZZOUNI Abstract: All sides in the recent debates over the Quine-Putnam Indispensability thesis presuppose Quine’s criterion for determining what a discourse is ontologically committed to. I subject the criterion to scrutiny, especially in regard to the available competitor-criteria, asking what means of evaluation there are for comparing alternative criteria against each other. Finding none, the paper concludes that ontological questions, in a certain sense, are philosophically indeterminate. (What is C. trying to pull?) marginalia on Quine’s copy of a letter from Carnap 1. A lot of philosophy of mathematics is motivated by considerations arising from what has come to be called the Quine-Putnam indispensability thesis;1 the claim, roughly, that if one’s best scientific (physical) theory requires existential quantification over certain entities, then one is onto- logically committed to such entities.2 Many books in this area, such as Chihara (1990), Field (1980), Hellman (1989), and Maddy (1990), draw their philosophical raison d’être from the view that scientific theories commit us to the existence of mathematical objects this way. The indispensability thesis, it seems, drives philosophers to hard choices: rewrite one’s science, rewrite one’s mathematics, or regretfully embrace extravagant ontologies. It’s quite unsurprising, therefore, that such a seminal claim has once again come under intense scrutiny; and equally unsurprising, I guess, to find philosophers on both sides of the philosophical fence. Maddy strongly Pacific Philosophical Quarterly 79 (1998) 1–18 0031–5621/98/0100–0000 © 1998 University of Southern California and Blackwell Publishers Ltd. -
97 Herman Cappelen, Tamar Szabo Gendler, and John Hawthorne, Eds
Philosophy in Review XXXVII (June 2017), no. 3 Herman Cappelen, Tamar Szabo Gendler, and John Hawthorne, eds. The Oxford Handbook of Philosophical Methodology. Oxford University Press 2016. 688 pp. $150.00 USD (Hardcover ISBN 9780199668779). A working assumption within philosophy is that from the point of view of research, philosophers make use of a diverse set of methods. This includes, though is not limited to, argumentation, explanation, analysis, description, interpretation and so on. A further point to note is that the use of such methods may be found among practicing philosophers both today as well as within the history of philosophy, and likewise across diverse disciplines and philosophical movements from pragmatism to logical positivism, phenomenology to deconstructionism. What we find is that although philosophers may disagree on most philosophical issues, the question of whether or not philosophy simply makes use of method is hardly controversial. A further assumption that might be made is that one or another method serves best to characterize the philosophical endeavor. Here we might point to reason and argument as a primary instance of this. Since ancient times, philosophers have clearly set themselves apart from the other domains of inquiry in the use of argument, reasoned discourse and debate. The problem with such an assumption, however, is that it is far from self-evident. Although philosophy certainly makes use of argumentation, since at least the 20th century, the use of rational speculation and demonstration has tended to diminish in favor of other approaches far more critical in nature, e.g., analysis and description. A further objection may be found today in the increasing use of empirical evidence as a foundation for philosophical inquiry, so-called ‘experimental’ philosophy, which in many ways opposes traditional ‘armchair’ methods. -
Lewis on Conventions and Meaning
Lewis on conventions and meaning phil 93914 Jeff Speaks April 3, 2008 Lewis (1975) takes the conventions in terms of which meaning can be analyzed to be conventions of truthfulness and trust in a language. His account may be adapted to state an analysis of a sentence having a given meaning in a population as follows: x means p in a population G≡df (1a) ordinarily, if a member of G utters x, the speaker believes p, (1b) ordinarily, if a member of G hears an utterance of x, he comes to believe p, unless he already believed this, (2) members of G believe that (1a) and (1b) are true, (3) the expectation that (1a) and (1b) will continue to be true gives members of G a good reason to continue to utter x only if they believe p, and to expect the same of other members of G, (4) there is among the members of G a general preference for people to continue to conform to regularities (1a) and (1b) (5) there is an alternative regularity to (1a) and (1b) which is such that its being generally conformed to by some members of G would give other speakers reason to conform to it (6) all of these facts are mutually known by members of G Some objections: • Clause (5) should be dropped, because, as Burge (1975) argued, this clause makes Lewis's conditions on linguistic meaning too strong. Burge pointed out that (5) need not be mutually known by speakers for them to speak a meaningful language. Consider, for example, the case in which speakers believe that there is no possible language other than their own, and hence that there is no alternative regularity to (1a) and (1b). -
Following the Argument Where It Leads
Following The Argument Where It Leads Thomas Kelly Princeton University [email protected] Abstract: Throughout the history of western philosophy, the Socratic injunction to ‘follow the argument where it leads’ has exerted a powerful attraction. But what is it, exactly, to follow the argument where it leads? I explore this intellectual ideal and offer a modest proposal as to how we should understand it. On my proposal, following the argument where it leaves involves a kind of modalized reasonableness. I then consider the relationship between the ideal and common sense or 'Moorean' responses to revisionary philosophical theorizing. 1. Introduction Bertrand Russell devoted the thirteenth chapter of his History of Western Philosophy to the thought of St. Thomas Aquinas. He concluded his discussion with a rather unflattering assessment: There is little of the true philosophic spirit in Aquinas. He does not, like the Platonic Socrates, set out to follow wherever the argument may lead. He is not engaged in an inquiry, the result of which it is impossible to know in advance. Before he begins to philosophize, he already knows the truth; it is declared in the Catholic faith. If he can find apparently rational arguments for some parts of the faith, so much the better: If he cannot, he need only fall back on revelation. The finding of arguments for a conclusion given in advance is not philosophy, but special pleading. I cannot, therefore, feel that he deserves to be put on a level with the best philosophers either of Greece or of modern times (1945: 463). The extent to which this is a fair assessment of Aquinas is controversial.1 My purpose in what follows, however, is not to defend Aquinas; nor is it to substantiate the charges that Russell brings against him. -
Believing the Axioms. I Penelope Maddy the Journal of Symbolic
Believing the Axioms. I Penelope Maddy The Journal of Symbolic Logic, Vol. 53, No. 2. (Jun., 1988), pp. 481-511. Stable URL: http://links.jstor.org/sici?sici=0022-4812%28198806%2953%3A2%3C481%3ABTAI%3E2.0.CO%3B2-3 The Journal of Symbolic Logic is currently published by Association for Symbolic Logic. Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/about/terms.html. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://www.jstor.org/journals/asl.html. Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. JSTOR is an independent not-for-profit organization dedicated to and preserving a digital archive of scholarly journals. For more information regarding JSTOR, please contact [email protected]. http://www.jstor.org Tue Apr 3 15:14:09 2007 THEJOURNALOF SYMBOLICLOGIC Volume 53, Number 2, June 1988 BELIEVING THE AXIOMS. I PENELOPE MADDY Nothing venture, nothing win, Blood is thick, but water's thin. -Gilbert & Sullivan $0. Introduction. Ask a beginning philosophy of mathematics student why we believe the theorems of mathematics and you are likely to hear, "because we have proofs!" The more sophisticated might add that those proofs are based on true axioms, and that our rules of inference preserve truth. -
Logic Colloquium 2007 Edited by Francoise¸ Delon, Ulrich Kohlenbach, Penelope Maddy and Frank Stephan Frontmatter More Information
Cambridge University Press 978-0-521-76065-2 - Logic Colloquium 2007 Edited by Francoise¸ Delon, Ulrich Kohlenbach, Penelope Maddy and Frank Stephan Frontmatter More information Logic Colloquium 2007 The Annual European Meeting of the Association for Symbolic Logic, also known as the Logic Colloquium, is among the most prestigious annual meetings in the field. The current volume, Logic Colloquium 2007, with contributions from ple- nary speakers and selected special session speakers, contains both expository and research papers by some of the best logicians in the world. This volume covers many areas of contemporary logic: model theory, proof theory, set theory, and computer science, as well as philosophical logic, including tutorials on cardinal arithmetic, on Pillay’s conjecture, and on automatic structures. This volume will be invaluable for experts as well as those interested in an overview of central contemporary themes in mathematical logic. Fran¸coiseDelon was Directrice d’´etudesat the Centre de Formation des PEGC of Reims and Humboldt Stipendiatin at Freiburg and is presently a Directrice de Recherche at Centre National de la Recherche Scientifique. Ulrich Kohlenbach is a Professor of Mathematics at TU Darmstadt (Germany). He is the coordinating editor of Annals of Pure and Applied Logic and the president of the Deutsche Vereinigung f¨urMathematische Logik und f¨urGrundlagen der Exakten Wissenschaften. Penelope Maddy is a Distinguished Professor of Logic and Philosophy of Science at the University of California, Irvine. She is a Fellow of the American Academy of Arts and Sciences and is currently the president of the Association for Symbolic Logic. Frank Stephan is an Associate Professor in the departments of mathematics and computer science at the National University of Singapore. -
COMMENTS and CRITICISM WORDS on WORDS* Awthorne and Lepore’S Paper Begins Thus
504 the journal of philosophy COMMENTS AND CRITICISM WORDS ON WORDS* awthorne and Lepore’s paper begins thus: H “ ” In his seminal paper Words, David Kaplan addresses a pair of questions that have been largely neglected by the philosophical community: (i) Under what conditions are two utterances utterances of the same word? (ii) What are words? That these questions have not received much attention is rather surpris- ing: after all, philosophers and linguists frequently appeal to consider- ations about word and sentence identity in connection with a variety of puzzles and problems that are foundational to the very subject matter of philosophy of language and linguistics. Kaplan’s attention to words is thus to be applauded. And there is no doubt that his discussion contains many useful insights.1 [Emphasis missing in the original.] As we say in the Passover service, Dayenu. That alone would have been sufficient. Unfortunately, as I have discovered to my sorrow, papers that begin like this always continue, at length, in a different vein. In fact, the very next word in their introduction is “Nevertheless.” I will respond to some of their criticisms, but I want to say at the outset that in my view, when you publish something, you put it out there for all eyes to see from their own perspective. And so, I believe * This article is an attempt to reconstruct a paper delivered to a symposium at the American Philosophical Association meeting in San Francisco on April 3, 2010. It spe- cifically aims to do no more than that. In order to avoid an endless back and forth, we all agreed to publish what was presented, rather than second thoughts based on what the others had presented. -
An Overview of Logic, Proofs, Set Theory, and Functions Contents
An Overview of Logic, Proofs, Set Theory, and Functions aBa Mbirika and Shanise Walker Contents 1 Numerical Sets and Other Preliminary Symbols3 2 Statements and Truth Tables5 3 Implications 9 4 Predicates and Quantifiers 13 5 Writing Formal Proofs 22 6 Mathematical Induction 29 7 Quick Review of Set Theory & Set Theory Proofs 33 8 Functions, Bijections, Compositions, Etc. 38 9 Solutions to all exercises 42 Index 51 Preface: This handout is meant primarily for those students who are already familiar with most of the subject matter contained within (that is, those who have taken a proofs class before). Its purpose is to provide a foundation as a proofs refresher when taking classes like Real Analysis I or II, Abstract Algebra I or II, Number Theory, Discrete Mathematics, Linear Algebra, etc. LICENSE Creative Commons License (CC BY-NC-SA): This text, including the art and illustrations, are available under the Creative Commons license (CC BY-NC- SA), allowing anyone to reuse, revise, remix and redistribute the text. To view a copy of this license, visit https://creativecommons.org/licenses/by-nc-sa/4.0/ Section 1 NUMERICAL SETS AND OTHER PRELIMINARY SYMBOLS Page 3 1 Numerical Sets and Other Preliminary Symbols The following are numerical sets that you should familiarize yourself with: natural numbers 1 N = f1; 2; 3;:::g integers Z = f:::; −3; −2; −1; 0; 1; 2; 3;:::g a rational numbers Q = b j a; b 2 Z and b 6= 0 real numbers R = frational and irrational numbersg p complex numbers C = fa + bi j a; b 2 R and i = −1g p Gaussian integers Z[i] = fa + bi j a; b 2 Z and i = −1g 2πi Eisenstein integers Z[ρ] = fa + bρ j a; b 2 Z and ρ = e 3 g even integers 2Z = f2k j k 2 Zg odd integers 2Z + 1 = f2k + 1 j k 2 Zg arithmetic progression aZ + b = fak + b j k 2 Zg where a; b fixed CULTURAL QUESTION 1: Why are the integers denoted Z? ANSWER: The German word for \numbers" is Zahlen. -
Philosophy 539/Theory of Knowledge: Evidence
Philosophy 539/Theory of Knowledge: Evidence Princeton University Spring 2008 Wednesdays 1:30-4:20, Marx 201 An examination of select issues at the intersection of philosophy of science and epistemology, with a focus on the theme of ‘evidence’. Recent work on the concept of evidence, with some attention to both informal and formal approaches. Williamson’s conception of evidence as knowledge. Evidence and epistemic diversity. How should we think of evidence which bears on philosophical theories? (Is there some distinctive kind of ‘philosophical’ evidence, e.g., ‘intuitions’, or is such evidence ultimately of a piece with scientific evidence?) In what respects (if any) does common sense provide a kind of data for philosophy? The role of normative ideals for believers who have evidence of their own finitude and fallibility. Bas van Fraassen Thomas Kelly 219 1879 Hall 221 1879 Hall [email protected] [email protected] Office hrs: Th.12:30-1:20 + by appt. Office hrs: F 12-12:50 + by appt. 1. February 6th. Introduction/Overview 2. February 13th. Evidence: What Is It? Williamson on evidence *Timothy Williamson, “Evidence”, Chapter 9 of his Knowledge and Its Limits (Oxford University Press 2000), pp.184-208. Thomas Kelly, “Evidence”, in The Stanford Encyclopedia of Philosophy. Available online at http://plato.stanford.edu/entries/evidence/. 3. February 20th. Evidence and Epistemic Diversity (I). *Roger White, “Epistemic Permissiveness” in John Hawthorne (ed.) Philosophical Perspectives, vol.19: Epistemology (Blackwell 2005), pp.445-459. Bas’ voluntarist response. 2 4. February 27th. Evidence and Epistemic Diversity (II). *Thomas Kelly, “Peer Disagreement and Higher Order Evidence” forthcoming in Richard Feldman and Ted Warfield (eds.) Disagreement (Oxford University Press 2008). -
CURRICULUM VITAE Penelope Maddy
CURRICULUM VITAE Penelope Maddy Department of Logic and Philosophy of Science 949-824-1520 (dep’t) University of California at Irvine 949-824-4133 (office) Irvine, CA 92697-5100 [email protected] Education Princeton University, 1974-1978 PhD in Philosophy, January, 1979 University of California at Berkeley, 1968-1972 B. A. in Mathematics, June, 1972 Professional Positions UCI Distinguished Professor, 2007-present Professor of Logic and Philosophy of Science, 1998-present Professor of Mathematics, 1989 - present Professor of Philosophy, 1989 - 1998, 2014-present Associate Professor of Philosophy and of Mathematics, 1987-1989 University of California at Irvine Associate Professor, 1983-1987 Department of Philosophy University of Illinois at Chicago Assistant Professor, 1979-1983 Lecturer, 1978-1979 Department of Philosophy Department of Mathematics University of Notre Dame Honors Phi Beta Kappa-Romanell Professor, 2014-2015 UCI Distinguished Professor, November 2007- present Ambrose/Tymoczko Lecture, Smith College, February 2007 Gauss Lecture, Dresden, Germany, October 2006 Lakatos Prize for Naturalism in Mathematics, November 2002 Chancellor’s Professor, April 2002-November 2007 UCI Distinguished Faculty Lecturership for Research, March 2002 Patrick Romanell Lecture on Philosophical Naturalism, APA, December 2001 Elected to American Academy of Arts and Sciences, April 1998 NSF Research Grant, 1994-95 NSF Research Grant, 1990-91 UCI Academic Senate Research Fellowship, 1990-91 NSF Research Grant, 1988-89 UC President's Research Fellowship, 1988-89 Postdoctoral Scholar, UCLA Department of Mathematics, 1986 NSF Research Grant, Calendar Year 1986 NEH Fellowship, Summer 1984 UIC Short Research Leave, Spring 1984 AAUW Fellowship, 1982-1983 Notre Dame Faculty Research Grant, Summer 1981 Marshall Scholarship, 1972-1973 UC Berkeley, Mathematics Department Citation, 1972 B. -
Summary of the Full License, Which Is Available On-Line at to Harmony
Proofs and Concepts the fundamentals of abstract mathematics by Dave Witte Morris and Joy Morris University of Lethbridge incorporating material by P. D. Magnus University at Albany, State University of New York Preliminary Version 0.78 of May 2009 This book is offered under the Creative Commons license. (Attribution-NonCommercial-ShareAlike 2.0) The presentation of logic in this textbook is adapted from forallx An Introduction to Formal Logic P. D. Magnus University at Albany, State University of New York The most recent version of forallx is available on-line at http://www.fecundity.com/logic We thank Professor Magnus for making forallx freely available, and for authorizing derivative works such as this one. He was not involved in the preparation of this manuscript, so he is not responsible for any errors or other shortcomings. Please send comments and corrections to: [email protected] or [email protected] c 2006–2009 by Dave Witte Morris and Joy Morris. Some rights reserved. Portions c 2005–2006 by P. D. Magnus. Some rights reserved. Brief excerpts are quoted (with attribution) from copyrighted works of various authors. You are free to copy this book, to distribute it, to display it, and to make derivative works, under the following conditions: (1) Attribution. You must give the original author credit. (2) Noncommercial. You may not use this work for commercial purposes. (3) Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license identical to this one. — For any reuse or distribution, you must make clear to others the license terms of this work.