Many people like to think that their moral or political enemies are not just wicked or wrong - as if that were not enough - but stupid or idiotic too. We tend to find this attitude too in the contemporary religion debate. It might console those on each side of the debate to think of their opponents in these terms, but if we want to make real progress in understanding what is going on here, this approach cannot help.

Even if we ignore the 'non-theoretical' knowledge which we acquire through experience (such as the knowledge of what something tastes like) and concentrate on theoretical knowledge, there is no good reason to think that physics can literally give the theory of everything. Here I want to be really pedantic. Although everything may be subject to physical law, not everything can be explained or described in physical terms. Physics has literally nothing to say about society, morality and the mind, for example - but of course these are parts of 'everything'.

Science will always raise philosophical questions like, is any scientific theory or model correct? How do we know? Are unobserved things real? etc. and it seems to me of great importance that these questions are not just left to scientists, but that there are thinkers who make it their business to think as clearly and slowly about these questions as it is possible to. Great scientists do not always make the best philosophers.

Music is one of my big interests - I once had a rather fanciful ambition to be a singer - and of course music is philosophically fascinating. What it is for music to express emotion strikes me as one of the most difficult questions - it's hard to say what it precisely means, although it plainly does mean something. But whenever I have tried to say something about this, it has come out as either banal or pretentious or both.

Since I don't believe in externalism, I don't think it can explain consciousness!

There's that great Irish joke: a man is lost in the countryside, stops a passer-by: 'how do I get to Dublin?'. The passer-by says 'well, I wouldn't start from here'. Rather than starting by talking in the abstract about materialism, dualism, 'material stuff' and things like that in regard to the mind, I would rather start from somewhere else.

Problems come and go over time, and to understand why is a difficult historical task. If one wanted to find the origin of a problem, historical research and close attention to texts is what is needed, not unconstrained speculation about the 'pictures' that philosophers must be in the grip of.