 I mean, the problem of what is consciousness, of course, that's the big one, isn't it? But, you know, where is it is maybe easier to answer than what it is. I think we all have an idea of what we think it is, but then if we try and explain what that is, it becomes really quite complicated. And just to be sort of quick on that point, what I ended up coming up with was a thing that I called the if question.