Tim: This would have been a real simple project, now you screwed up, it'll take me three times as long to do it.
Jill: Oh, cry me a river! If you'd fixed this in the first place, we wouldn't have this problem, would we?
Tim: So, it's my fault that you screwed it up?
Jill: Hey, this is no more screwed up than it was before you didn't fix it.
Tim: I really want to argue with that, but I have no idea what you just said to me.