This question is for bonus. I think my teacher got it out of a book called "Lateral Thinking Puzzlers". The question is something like this, "A woman sitting across the table from her two sons is talking to them. They talk back. They never speak a word to each other, though. They are both physically capable of speaking to each other". Our only clue was that they wanted to talk to each other, but they could not. I was thinking that maybe they speak different languages or something, but that doesn't really make sense.