It's so easy to say the three words, "I don't know". By saying that, you don't have to put more effort anymore. You don't have to try anymore and you certainly don't have to blame yourself for not knowing. Just by saying I don't know, you absolve yourself of all responsibilities. Suddenly, it's other people's problem - those who 'know' - and you just have to wait for them to help you solve it. The difference between a good student and a bad one can be seen by how easily they say those three words. Good students face as much difficulties as bad students when they encounter something new, but their attitude makes all the difference. They seldom say I don't know. In fact, they seldom give up. They'll work on a problem until the problem gives way. If they can't do it, they'll try it again and again. If ......