Without Question

I once gave a lecture to high school teachers. Afterward, there was time set aside for questions, but there were none.

I asked the teachers: "Don't you normally give your own students a chance to ask questions?" After a long silence, one teacher asked me: "Could you please give us an analysis as to why we cannot raise any questions?"

In fact, it's not the first time I've encountered such an embarrassing silence in my classes. Sometimes even with a lot of encouragement, trying to inspire them and even offering to invite them to dinner, my students are still unable to come up with a single question.