I'd a soon not
A person who says nothing when asked a question. They're like a broken toaster, you press the button, nothing happens.
The cop asked him why he was there, and he just stood there like he was waiting for a bus.
When the boss asked why he was late, he just shrugged and walked out.
The kid was asked why he didn't do his homework, and he just looked at the floor like it was the most interesting thing ever.