asymmetric information

(Scene: after a class period spent learning about how the IS, LM, and BP curves shift in response to fiscal and monetary policy actions depending on whether exchange rates are fixed or flexible and capital mobility is perfect or imperfect. If this sounds to you like a gargantuan ball of knotted string with the point hidden at the center, then you've got the general concept.)

Professor: This is complicated stuff; most graduate students have trouble understanding it. It takes time to learn. So go home and play with these ideas.

Classmate: Will this stuff be on the test on Thursday?

Professor: Oh yes.

So, in other words, I have less than 48 hours to learn something that graduate students do not understand.

Please tell me how this makes sense.