The equation of the world with 'life' and 'life' with consciousness ramified into the baffling account Wittgenstein gave of the 'philosophical self '. The physical world, as Descartes argued, is made of material substance, and the mental world 'is liable to be imagined as gaseous, or rather, aethereal'. Conceiving of consciousness as a private realm populated by private experiences, one is bound to be puzzled at its evolutionary emergence. Consciousness is attributable to an organism as a whole, not to its (...) parts, no matter how complex. And it is attributable to the organism on the grounds of the behaviour of the organism, its exercise of its perceptual faculties, its susceptibility to sensation, and its voluntary action. A venerable tradition going back at least as far as Descartes conceived of consciousness as the immovable rock against which the waves of scepticism break. (shrink)

... 243-) INTRODUCTION §§243- constitute the eighth 'chapter' of the book. Its point of departure is a natural query with respect to the conclusion of the ...