Comment by oggy

I'm not a mathematician either ;) Yeah, I won't sit around and ponder at a property definition for weeks. But I will maybe spend a day on it, not get anywhere, and then spend an hour or two a day thinking about ways to formulate it. Sometimes I try something, then an hour later figure out it won't work, but sometimes I really do just stare at the ceiling with no idea how to proceed. Helps if you have someone to talk to about it!