"But we feel that the only dumb question is the one not asked."

What a dumb question to ask at that point of time.

And most years it wouldn't be such a dumb question.

But he had never been afraid of asking a dumb question.

Before I had the chance to ask any dumb questions they were gone, and the table was in front of me.

She gave me a look, like I had asked a dumb question.

Maybe a dumb question here but I will still ask.

Another dumb question, since they'd both been looking out the window.

It was really a dumb question because he knew the answer might take hours.

It was a dumb question, but I couldn't think of anything else to say.