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Logicism Reconsidered
 In Shapiro
, 2005
"... This paper is divided into four sections. The first two identify different logicist theses, and show that their truthvalues can be conclusively established on minimal assumptions. Section 3 sets forth a notion of ‘contentrecarving ’ as a possible constraint on logicist theses. Section 4—which is l ..."
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This paper is divided into four sections. The first two identify different logicist theses, and show that their truthvalues can be conclusively established on minimal assumptions. Section 3 sets forth a notion of ‘contentrecarving ’ as a possible constraint on logicist theses. Section 4—which is largely independent from the rest of the paper—is a discussion of ‘NeoLogicism’. 1 Logicism 1.1 What is Logicism? Briefly, logicism is the view that mathematics is a part of logic. But this formulation is imprecise because it fails to distinguish between the following three claims: 1. LanguageLogicism The language of mathematics consists of purely logical expressions.
Innocent Statements and Their Metaphysically Loaded Counterparts
, 2007
"... here is an old puzzle about ontology, one that has been puzzling enough to cast a shadow of doubt over the legitimacy of ontology as a philosophical project. The puzzle concerns in particular ontological questions about natural numbers, properties, and propositions, but also some other things as wel ..."
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here is an old puzzle about ontology, one that has been puzzling enough to cast a shadow of doubt over the legitimacy of ontology as a philosophical project. The puzzle concerns in particular ontological questions about natural numbers, properties, and propositions, but also some other things as well. It arises as follows: ontological questions about numbers, properties, or propositions are questions about whether reality contains such entities, whether they are part of the stuff that the world is made of. The ontological questions about numbers, properties, or propositions thus seem to be substantive metaphysical questions about what is part of reality. Complicated as these questions may be, they can nonetheless be stated simply in ordinary English with the words ‘Are there numbers/properties/propositions?’ However, it seems that such a question can be answered quite immediately in the affirmative. It seems that there are trivial arguments that have the conclusion that there are numbers/properties/
Induction and Indefinite Extensibility: The Gödel Sentence is True, but Did Someone Change the Subject?
"... Over the last few decades Michael Dummett developed a rich program for assessing logic and the meaning of the terms of a language. He is also a major exponent of Frege’s version of logicism in the philosophy of mathematics. Over the last decade, Neil Tennant developed an extensive version of logicis ..."
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Over the last few decades Michael Dummett developed a rich program for assessing logic and the meaning of the terms of a language. He is also a major exponent of Frege’s version of logicism in the philosophy of mathematics. Over the last decade, Neil Tennant developed an extensive version of logicism in Dummettian terms, and Dummett influenced other contemporary logicists such as Crispin Wright and Bob Hale. The purpose of this paper is to explore the prospects for Fregean logicism within a broadly Dummettian framework. The conclusions are mostly negative: Dummett’s views on analyticity and the logical/nonlogical boundary leave little room for logicism. Dummett’s considerations concerning manifestation and separability lead to a conservative extension requirement: if a sentence S is logically true, then there is a proof of S which uses only the introduction and elimination rules of the logical terms that occur in S. If basic arithmetic propositions are logically true—as the logicist contends—then there is tension between this conservation requirement and the ontological commitments
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legal responsibility for the information which this document contains or the use to which this information is subsequently put. Although every step is taken to ensure that the information is as accurate as possible, it is understood that this material is supplied on the basis that there is no legal responsibility for these materials or resulting from the use to which these can or may be put. Note: the telephone and fax numbers given in this guide for addresses outside the United Kingdom are those to be used if you are in that country. If you are telephoning or faxing from another country, we suggest you contact your local telecommunications provider for details of the country code and area code that you should use. Main contents
Logic and Metaphysics ∗
"... In this article, we canvass a few of the interesting topics that philosophers can pursue as part of the simultaneous study of logic and metaphysics. To keep the discussion to a manageable length, we limit our survey to deductive, as opposed to inductive, logic. Though most of this article ..."
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In this article, we canvass a few of the interesting topics that philosophers can pursue as part of the simultaneous study of logic and metaphysics. To keep the discussion to a manageable length, we limit our survey to deductive, as opposed to inductive, logic. Though most of this article
What is Neologicism? 2 What is Neologicism? ∗
"... Logicism is a thesis about the foundations of mathematics, roughly, that mathematics is derivable from logic alone. It is now widely accepted that ..."
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Logicism is a thesis about the foundations of mathematics, roughly, that mathematics is derivable from logic alone. It is now widely accepted that
unknown title
, 2013
"... This paper is an effort to extract some of the main theses in the philosophy of mathematics from my book, The Construction of Logical Space. I show that there are important limits to the availability of nominalistic paraphrasefunctions for the language of arithmetic, and suggest a way around the pr ..."
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This paper is an effort to extract some of the main theses in the philosophy of mathematics from my book, The Construction of Logical Space. I show that there are important limits to the availability of nominalistic paraphrasefunctions for the language of arithmetic, and suggest a way around the problem by developing a method for specifying nominalistic contents without corresponding nominalistic paraphrases. Although much of the material in this paper is drawn from the book—and from an earlier paper (Rayo 2008)—I hope the present discussion will earn its keep by motivating the ideas in a new way, and by suggesting further applications. 1 Nominalism Mathematical Nominalism is the view that there are no mathematical objets. A standard problem for nominalists is that it is not obvious that they can explain what the point of a mathematical assertion would be. For it is natural to think that mathematical sentences like ‘the number of the dinosaurs is zero ’ or ‘1 + 1 = 2 ’ can only be true if mathematical objects exist. But if this is right, the nominalist is committed to the view that such sentences are untrue. And if the sentences are untrue, it not immediately obvious that they would be
DOI 10.1007/s112290119883y What are numbers?
"... Abstract This paper argues that (cardinal) numbers are originally given to us in the context ‘Fs existnwise’, and accordingly, numbers are certain manners or modes of existence, by addressing two objections both of which are due to Frege. First, the socalled Caesar objection will be answered by ex ..."
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Abstract This paper argues that (cardinal) numbers are originally given to us in the context ‘Fs existnwise’, and accordingly, numbers are certain manners or modes of existence, by addressing two objections both of which are due to Frege. First, the socalled Caesar objection will be answered by explaining exactly what kind of manner or mode numbers are. And then what we shall call the Functionality of Cardinality objection will be answered by establishing the fact that for any numbers m and n, if there are exactly mFs and also there are exactly nFs, then m = n.