Harold Noonan

This new book offers a comprehensive and accessible introduction to Frege's remarkable philosophical work, examining the main areas of his writings and demonstrating the connections between them. Frege's main contribution to philosophy spans philosophical logic, the theory of meaning, mathematical logic and the philosophy of mathematics. The book clearly explains and assesses Frege's work in these areas, systematically examining his major concepts, and revealing the links between them. The emphasis is on Frege's highly influential work in philosophical logic and the theory of meaning, including the features of his logic, his conceptions of object, concept and function, and his seminal distinction between sense and reference. Frege will be invaluable for students of the philosophy of language, philosophical logic, and analytic philosophy.

Strong pluralists hold that not even permanent material coincidence is enough for identity. Strong pluralism entails the possibility of purely material objects -- even if not coincident -- alike in all general respects, categorial and dispositional, relational and non-relational, past, present and future, at the microphysical level, but differing in some general modal, counterfactual or dispositional repscts at the macrophysical level. It is objectionable because it thus deprives us of the explanatory resources to explain why evident absurdities are absurd. A second objection is to the suggestion that cases involving artefacts can illustrate strong pluralism. This offends against the principle that gien a complex intrinsic microphysical property instantiated in some regiion, the number of material things possessing it in that region cannot depend on the existence and nature of intentional activity taking place outside it

Can the world itself _be_ vague, so that rather than vagueness be a deficiency in our mode of describing the world, it is a necessary feature of any true description of it? Gareth Evans famously poses this question in his paper ‘Can There Be Vague Objects’ (Analysis 38(4):208, 1978 ). In his recent paper ‘Indeterminacy and Vagueness: Logic and Metaphysics’, Peter van Inwagen ( 2009 ) elaborates the account of vagueness and, in particular, in the case of sentences, consequent indeterminacy in truth value, to which this conception of ‘worldly’ vagueness is opposed, calling it the ‘sensible’ theory of indeterminacy and rejecting it. In what follows, I defend the sensible theory van Inwagen rejects. I first explain more fully what it involves and, as importantly, what it does not.

In his interesting article, Michael Burke (1996) offers a novel solution to the puzzle of Tibbles, the cat, a solution he says, which is based on Aristotelian essentialism. In what follows I argue that, despite its ingenuity, Burke’s solution can be seen to be too implausible to be accepted once we extend it to a variant of the puzzle Burke himself suggests. The conclusion must be that one of the other solutions to the puzzle must be correct. Or, perhaps, that there is no correct solution and that we should simply (to use a Wittgensteinian turn of phrase) ‘say what we like as long as we are clear about the facts.’