Although I'm irritated that the flipping of 1 and 2 was very noticeable and having noticed it I decided that was "the trick" and thought no more (thus getting the wrong answer) I still thionk it's a good question. It's very important when desk-checking someone's code or trying to debug something to do it carefully and follow through on the whole thing, not stop thinking when you spot something odd, so questions like this are valuable - they remind us that leaping to conclusions without considering all the code is a stupid thing to do.