Jerry: Steve, we're supposed to be learning the stuff in THIS book!
Steve: Oh, that's just not possible.

Steve: This requires knowledge of linear algebra, and if you recall, our linear algebra class was only offered at 8:00 AM.

Jerry: Ooo. I DO remember. Didn't we decide to take that class the next semester? When was that?

Steve: That was THIS semester!
Jerry: Oh no big then. We were screwed by default.