Next arises inevitable the question whether Man is more than a machine. I have identified myself for many years with those who have tried to push to the limit the idea that the brain is essentially a form of mechanism, very complex but essentially mechanistic in the sense of being state-determined. The possible inadequacy of the mechanistic aspect has never worried me, for it has always seemed to me to be clear that a demostartion that the brain is more than a machine can be successful only if one first knows thoroughly what one means by a "machine". Only when the idea of machine is ppushed to its limit can we see whether the application to Man breaks down or not. Thus those of us who are pushing to the llimit the possibilities of what a mecahnical brain can do are defining the limit to which the machine can go.
One thing seems to me to be clear. The demonstration that Man is more than a machine will be done only by him who really knows what the word 'machine' means." 21