>Two students asked if I was going to continue asking them about things they had never studied in the class.

I'm in grad school and people still ask this question after tests. Many of my peers expect only to be asked questions that have already been asked during the course of instruction, or at least ones that resemble them very closely. I think this is pretty good evidence that people are only in school for the degree and not for the skills and practice of thinking/wondering/exploring on their own.

This might have something to do with our generally rather antiquated public educational system that basically beats "wondering" out of students heads in favor of industrial education.*

*This is not true of all teachers or all schools systems, but it applies to much of my experience.