"The SWAG Method

The professor was attempting to explain a complicated problem to his students.  None of them seemed to be able to come up with the answer.  The professor tried everything he could to make his students understand.  Finally, the professor said, "Well, if none of you is going to be able to solve this problem, you'll have to use the S.W.A.G. method."  One of the students raised his hand and asked, "What is the S.W.A.G." method, to which the professor responded "Scientific Wild Ass Guess."