Have you ever noticed that, in conversation with a relative stranger, when you mention your occupation or favourite subject of study or hobby or whatever, the person will often make a comment about your particular passion or interest. Often they’ll be an expert on the subject and will say something like, you know, there are two things about – thus and so. Try it sometime, when someone mentions something you happen to have an interest in, just say something like: there are two things about __________. I read that somewhere, some time ago. It’s kind of like that book, Everything…