As a teacher, what do you do in the below situation?

<p>I spent an hour and a half "pompously" discussing the idea of the "truth as a constant flow" while secretly celebrating the fact that I was probably making a difference in my students' way of thinking. When I asked them if they had any questions, one of them raised her hand and asked "Is this included in the second exam?" Another student asked "What kind of question will we get in the exam about this?"</p>