I've got a group project to do for one of my geography courses. Two of the people in my group are cool, the other one, we suspect (we being me and the two who are decent), hates us.

Of course, that could be our fault. Sometimes he gets what he thinks is a good idea, and explains it. He speaks clearly, he doesn't stutter, he uses proper English, but... he doesn't make any sense. He'll be explaining an idea, and we'll be listening, and we'll be thinking, huh? and waiting for the thought to clear up, and it doesn't. so then he's done and you can see "wtf?" written on our faces. I've started doing the smile and nod and "oh, okay" thing.