I labeled an exam question as "tricky" because if you applied the solution method we used in class to solve similar looking problems you would get the wrong answer. But it occurred to me that if the question had been identical to one given in class but I still labeled it as "tricky" the "tricky" label would have been accurate because the trick would have been students thinking that the obvious answer wasn't correct when indeed it was. So is it always accurate to label a question as "tricky"?