This essay distinguishes between metaphysical and epistemological conceptions of analyticity. The former is the idea of a sentence that is ‘true purely in virtue of its meaning’ while the latter is the idea of a sentence that ‘can be justifiably believed merely on the basis of understanding its meaning’. It further argues that, while Quine may have been right to reject the metaphysical notion, the epistemological notion can be defended from his critique and put to work explaining a priori justification. (...) Along the way, a number of further distinctions relevant to the theory of analyticity and the theory of apriority are made and their significance is explained. (shrink)

Formal implication is usually represented by symbolization such as ‘ φx ⊃ Ψx,’ which may be read, “for all values of ‘x’, φx implies Ψx.” If the values of the variable ‘x’, in ‘φx’ and ‘Ψx’ be ‘x1’ ‘x2’ ‘x3’, etc., then … ‘φx’ formally implies ‘Ψx’ if and only if, whatever values of ‘x’, ‘xn’, be chosen, ‘φxn’ materially implies ‘Ψxn’ …However, this still leaves it doubtful which of two possible interpretations of expressions having the form ‘ φx ⊃ (...) Ψx’ is to be taken as correct. … It means one thing to say, “Every existent having the property φ … has also the property Ψ,” and it means quite a different thing to say, “Every thinkable thing which should have the property φ must also have the property Ψ.” The second of these holds only when having the properly φ logically entails having the property Ψ; when ‘Ψx’ is deductible from ‘φx’. … The first of them, however, holds not only in such cases … but also in every case where among existent things, one property is universally accompanied by another. (shrink)

Thoughts and other mental states are defined by their role in a functional system. Since it is easier to determine when we have knowledge than when reasoning has occurred, Gilbert Harman attempts to answer the latter question by seeing what assumptions about reasoning would best account for when we have knowledge and when not. He describes induction as inference to the best explanation, or more precisely as a modification of beliefs that seeks to minimize change and maximize explanatory coherence. Originally (...) published in 1973. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905. (shrink)

The present paper gives a philosophical analysis of the conceptual variation in the homology concept. It is argued that different homology concepts are used in evolutionary and comparative biology, in evolutionary developmental biology, and in molecular biology. The study uses conceptual role semantics, focusing on the inferences and explanations supported by concepts, as a heuristic tool to explain conceptual change. The differences between homology concepts are due to the fact that these concepts play different theoretical roles for different biological fields. (...) The specific theoretical needs and explanatory interests of different research approaches lead to different homology concepts. (shrink)

This paper investigates what molecular biology has done for our understanding of the gene. I base a new account of the gene concept of classical genetics on the classical dogma that gene differences cause phenotypic differences. Although contemporary biologists often think of genes in terms of this concept, molecular biology provides a second way to understand genes. I clarify this second way by articulating a molecular gene concept. This concept unifies our understanding of the molecular basis of a wide variety (...) of phenomena, including the phenomena that classical genetics explains in terms of gene differences causing phenotypic differences. (shrink)

At its most extreme, semantic holism is the doctrine that all the inferential properties of an expression constitute its meaning. Holism is supported by the consideration that there is no principled basis for localism's distinction among these properties. The paper rejects four arguments for this. (1) The argument from confirmation holism is dismissed quickly because it rests on verificationism. (2) The argument from the rejection of analyticity fails because it saddles the localist with unacceptable epistemic assumptions. Localism is not committed (...) to a priori knowledge or to knowledge that is in any interesting sense unrevisable. (3) The argument from psychological explanation fails because it begs the question. (4) The argument from functionalism needs to be accompanied by a further argument that functionalism is essentially holistic. In any case it could only establish a very mild holism. (shrink)

At its most extreme, semantic holism is the doctrine that all the inferential properties of an expression constitute its meaning. Holism is supported by the consideration that there is no principled basis for localism's distinction among these properties. The paper rejects four arguments for this. (1) The argument from confirmation holism is dismissed quickly because it rests on verificationism. (2) The argument from the rejection of analyticity fails because it saddles the localist with unacceptable epistemic assumptions. Localism is not committed (...) to a priori knowledge or to knowledge that is in any interesting sense unrevisable. (3) The argument from psychological explanation fails because it begs the question. (4) The argument from functionalism needs to be accompanied by a further argument that functionalism is essentially holistic. In any case it could only establish a very mild holism. (shrink)

In their discussion of semantic holism, Fodor and Lepore claim that Quine showed that any inferential properties constituting a meaning cannot be distinguished on epistemic grounds like apriority. But they often write as if Quine showed that such properties cannot be distinguished at all. The paper argues that Quine did not show the latter. It goes on to propose a criterion for distinguishing the constitutive properties: they are the ones that determine reference. Fodor is not in a position to reject (...) this criterion since he already uses an analogous one in his own theory. (shrink)

Putnam (1975) and Burge (1979) have made a convincing case that neither mea- nings nor beliefs are in the head. Most philosophers, it seems, have accepted their argument. Putnam explained that a subject.