Peter Carruthers

The case for anti-realism in the theory of meaning, as presented by Dummen and Wright, 1 is only partly convincing. There is, I shall suggest, a crucial lacuna in the argument, that can only be filled by the later Wittgenstein's following-a-rule considerations. So it is the latter that provides the strongest argument for the rejection of semantic realism. By 'realism', throughout, I should be taken as referring to any conception of meaning that leaves open the possibility that a sentence may have a determinate truth-value although we are incapable - either in practice or in principle - of discovering what truth-value it has ('the possibility of veritication-transcendence' for short). 2 I shall say nothing further about what an anti-realist semantics might look like, nor about the possible consequences for logic, epistemology and metaphysics, beyond the fact that it must involve the rejection of any such conception of meaning.

This chapter defends the positive thesis which constitutes its title. It argues first, that the mind has been shaped by natural selection; and second, that the result of that shaping process is a modular mental architecture. The arguments presented are all broadly empirical in character, drawing on evidence provided by biologists, neuroscientists and psychologists (evolutionary, cognitive, and developmental), as well as by researchers in artificial intelligence. Yet the conclusion is at odds with the manifest image of ourselves provided both by introspection and by common-sense psychology. The chapter concludes by sketching how a modular architecture might be developed to account for the patently unconstrained character of human thought, which has served as an assumption in a number of recent philosophical attacks on mental modularity.

How might consciousness have evolved? Unfortunately for the prospects of providing a convincing answer to this question, there is no agreed account of what consciousness is. So any attempt at an answer will have to fragment along a number of different lines of enquiry. More fortunately, perhaps, there is general agreement that a number of distinct notions of consciousness need to be distinguished from one another; and there is also broad agreement as to which of these is particularly problematic - namely phenomenal consciousness, or the kind of conscious mental state which it is like something to have, which has a distinctive subjective feel or phenomenology (henceforward referred to as p-consciousness). I shall survey the prospects for an evolutionary explanation of p-consciousness, on a variety of competing accounts of its nature. My goal is to use evolutionary considerations to adjudicate between some of those accounts.