1.   He then answered the many penetrating questions put to him.

2.   How about just LISTENING to what information comes from the president and asking a penetrating question afterward?

3.   In the Speaking Tree, Marvin Minsky, the co-founder of the Artificial Intelligence Laboratory at the Massachusetts Institute of Technology, asked penetrating questions via videotape.

4.   It would be a sharp, morally unsettling work that asks penetrating questions about idealism, cynicism and political rot.

5.   He was known for his tough manner, penetrating questions and evenhanded stories.