Are there any (non-stupid) questions?

As faculty members, we certainly do not want to constrain students' curiosity; we want to create environments where they can experiment with new perspectives, where they feel free to ask broad, even playful, questions. However, to stop there is to fall short of our responsibility as educators. If we say that all questions are created equal and that there is no such thing as a stupid question, we are not teaching students to think critically.

From this article by Maureen Donohue-Smith in the Chronicle.