even if I can climb out of the seas of doubt onto the Cogito, I cannot climb out onto the nature of your mind. So how then do I know anything about your mental life? How do I know, for instance, that you see the colour blue the way that I do? Might it be that some of us feel pain more, but make less fuss about it, or that others feel pain less, but make more fuss? How do we begin to think about mind and body, brains and behaviour?
