Similarly, I go the same answer, but only by process of elimination. I knew it didn't have dots, I knew it didn't have a diamond, I knew it didn't have an x, by just extrapolating from the "cut offs" in the problem. That left me with 2, but it felt...wrong. It didn't feel intuitively right. If I had to pick on without thinking about it, number 2's the last one I'd pick.

I only understand the pattern in a cohesive way from looking at the comments. Now it makes sense, instead of being deduced from bits of dis-unified information.

Do I know my IQ now?