We can get at the problem of identifying what is going on inside our heads by imagining that we each have a box with something inside. We all name the thing inside ‘a beetle’, but we aren’t allowed to look in anyone else’s box, only our own. So it is quite possible that everyone has something different in the box, or that the thing inside is constantly changing, or even that there is nothing in the box. And yet we all call it ‘a beetle’. But for those with nothing in the box, the word ‘beetle’ is a name for nothing. It is not a name at all. Does this word therefore have any meaning? Are our
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