P. M. S. Hacker

1. Naturalism Naturalism, it has been said, is the distinctive development in philosophy over the last thirty years. There has been a naturalistic turn away from the a priori methods of traditional philosophy to a conception of philosophy as continuous with natural science. The doctrine has been extensively discussed and has won considerable following in the USA. This is, on the whole, not true of Britain and continental Europe, where the pragmatist tradition never took root, and the temptations of scientism in philosophy were less alluring. Contemporary American naturalism originates in the writings of Quine, the metaphysician of twentieth-century science. With extraordinary panache, he painted a largescale picture of human nature, of language and of the web of belief. I believe that in almost every major respect, it is, like the picture painted by Descartes, the great metaphysician of seventeenth-century science, mistaken. But it evidently appeals to the spirit of the times. So it is worthy of critical examination and careful refutation. I shall argue that the naturalistic turn is a cul-de-sac – a turn that is to be passed by if we are to keep to the highroad of good sense. Naturalism, like so many of Quine’s doctrines, was propounded in response to Carnap. As Quine understood matters, Carnap had been persuaded by Russell’s Our Knowledge of the External World that it is the task of philosophy to demonstrate that our knowledge of the external world is a logical construction out of, and hence can be reduced to, elementary experiences. Quine rejected the reductionism of Carnap’s Logischer Aufbau, and found the idealist basis uncongenial to his own dogmatic realist behaviourism, inspired by Watson and later reinforced by Skinner. The rejection of reductionism and ‘unregenerate realism’, Quine averred, were the sources of his naturalism (FME 72). What exactly was this? We can distinguish in Quine between three different but inter-related programmes for future philosophy: epistemological, ontological and philosophical naturalism. Naturalized epistemology is to displace traditional epistemology, transforming the investigation into ‘an enterprise within natural science’ (NNK 68) – a psychological enterprise of investigating how the ‘input’ of radiation, etc., impinging on the nerve endings of human beings can ‘ultimately’ result in an ‘output’ of our theoretical descriptions of the external world..

Professor Saul Kripke argued that the ‘real’ private language argument terminates with section 202 of the Investigations and is concerned with the logical and epistemological character of following a rule. According to his interpretation, Wittgenstein is propounding a sceptical paradox concerning rule following, which he resolves by means of a Humean answer. Careful examination of Wittgenstein’s text and of his preparatory notebooks shows this interpretation to be very far from anything Wittgenstein intended.

The logical positivists’ critical attitude towards metaphysics is sketched. Strawson’s conception of descriptive and revisionary metaphysics is described. Revisionary metaphysics is argued to be chimerical, and descriptive metaphysics is argued not to be a form of metaphysics at all. Strawson’s failure to account for the status of propositions of descriptive metaphysics is held to be remediable by reference to Wittgenstein’s conception of grammatical propositions that express norms of representation.

1. First person authority: the received explanation Over a wide range of psychological attributes, a mature speaker seems to enjoy a defeasible form of authority on how things are with him. The received explanation of this is epistemic, and rests upon a cognitive assumption. The speaker’s word is a authoritative because when things are thus-and-so with him, then normally he knows that they are. This is held to be because the speaker has direct and privileged access to the contents of his consciousness by means of introspection, conceived as a faculty of inner sense. Like perceptual knowledge, introspective knowledge is held to be direct and non-evidential. Accordingly, the first-person utterances ‘I have a pain’, ‘I believe that p’, ‘I intend to V’ are taken to be descriptions of what is evident to inner sense. Many classical thinkers held such subjective knowledge to be not only immediate, but also infallible and indubitable. The challenge to the received conceptions came from Wittgenstein. He denied the cognitive assumption, arguing that it cannot be said of me at all (except perhaps as a joke) that I know that I am in pain. For what is that supposed to mean — except perhaps that I am in pain?1 If it makes no sense to say that one knows that one is in pain, then the epistemic explanation is a non-starter, since it explains the special authoritative status of a person’s avowal of pain by reference to the putative fact that the subject of pain knows, normally knows, or cannot but know, that he is in pain when he is. It is important to note that Wittgenstein did not mechanically generalize the case of pain across the whole domain of firstperson utterances. The case of pain constitutes only one pole of a range of such utterances. Avowals and averrals of belief and intention approximate the other pole, and require independent analysis and grammatical description.

The controversy between Norman Malcolm and Peter Winch over the correct interpretation of the Tractatus conception of names, naming, and the method of projection of names is discussed. Evidence in favour of Malcolm’s realist interpretation of the Tractatus doctrine is elaborated: the meaning of a Tractatus name is not exhausted by its logico-syntactical role, which determines only its form. The method of projection is meaning by a name in an elementary proposition the object that is its meaning. In an appendix, Professor Cora Diamond’s objections to this interpretation are rebutted.

SECTIONS 28-46 OF THE Philosophical Investigations contain an elaborate and detailed criticism of a certain misguided conception of ostensive definition, and of the misconceptions of proper names which had characterized logical atomism. At least part of Wittgenstein’s critical discussion appears to be directed at views he himself had earlier adopted, explicitly or tacitly. Other parts are evidently directed at Russell. In section 46 Wittgenstein turns to discuss the ontological counterpart of the notion of the logically proper name—the simple object whose existence is necessary.

While thinking philosophically we see problems in places where there are none. It is for philosophy to show that there are no problems.Those of us who are not colour blind have a happy command of colour concepts. We say of trees that they are green in spring, that they are the same colour as grass and a different colour from the sky. If we shine a torch with a red bulb upon a white surface, we say that the surface looks pink although it is white. And if we suffer a bout of jaundice we claim that white things look yellowish to us, although they are not yellow, nor do they look yellow. We employ this tripartite distinction unworriedly and unthinkingly. But when, in doing philosophy, we are called upon to elucidate colour concepts it becomes evident that these elementary concepts present intricate problems to the philosophical understanding. It is extraordinarily difficult to obtain a proper surview of colour grammar, and the temptations of philosophical illusion are legion. We go wrong before the first step is even taken, and hence do not notice our errors, for they are implicit in every move we make. We multiply impossibilities seriatim, getting better, like the White Queen, with practice. We then either slide into scepticism, or alternatively exclude it on empirical grounds - appealing, as is so popular in American philosophical circles, to the wonders of science, in particular physics and neurophysiology, to keep the malin genie from the door.

Since the first publication of Insight and Illusion in l972, a wealth of Wittgenstein's writings has become accessible. Accordingly, in this edition Professor Hacker has rewritten six of his eleven original chapters and revised the others to incorporate the new abundant material.Insight and Illusion now fully clarifies the historical backgrounds of Wittgenstein's highly differing masterpices, the Tractatus and the Investigations, and traces the evolution of Wittgenstein's thought. Hacker explains all of Wittgenstein's writings in detail, focusing on his critique of metaphysics, his famous "private language argument," and his account of self consciousness.

Since the first publication of Insight and Illusion in l972, a wealth of Wittgenstein's writings have become accessible. Accordingly, in this edition Professor Hacker has rewritten six of his eleven original chapters and revised the others to incorporate the new abundant material. Insight and Illusion now fully clarifies the historical backgrounds of Wittgenstein's highly different masterpieces, the Tractatus and the Investigations, and traces the evolution of Wittgenstein's thought. Hacker explains all of Wittgenstein's writings in detail, focusing on his critique of metaphysics, his famous "private language argument," and his account of self-consciousness.

David Hodgson's review article, 'Goodbye To Qualia And All That?' in the February issue of this journal alleges that 'some of the basic propositions' of the book Max Bennett and I wrote together, Philosophical Foundations of Neuroscience , are fundamentally mistaken. He cites three issues: direct realism regarding perception; our insistence that it is wrong to suppose that a person has 'access', let alone 'privileged access', to his own experiences; and our contention that the subject of experience is not 'a self', but a human being. The reasoning behind his allegations is flawed, and the conclusion he draws from them, namely that 'qualia' are alive and well, does not follow

This major study examines the most fundamental categories in terms of which we conceive of ourselves, critically surveying the concepts of substance, causation, agency, teleology, rationality, mind, body and person, and elaborating the conceptual fields in which they are embedded. The culmination of 40 years of thought on the philosophy of mind and the nature of the mankind Written by one of the world’s leading philosophers, the co-author of the monumental 4 volume _Analytical Commentary on the Philosophical Investigations_ (Blackwell Publishing, 1980-2004) Uses broad categories, such as substance, causation, agency and power to examine how we think about ourselves and our nature Platonic and Aristotelian conceptions of human nature are sketched and contrasted Individual chapters clarify and provide an historical overview of a specific concept, then link the concept to ideas contained in other chapters.