He had decided to play it dumb for the time being, the better to check the accuracy of his own information.

He was clearly too dumb for such a position.

The boy was just too plain dumb for his own good.

I guess it's dumb for me to think it might make you feel better.

I think it's dumb for all the reasons above.

Now she was dumb for the first time, being no longer deaf.

Seeing her sweet smile struck him dumb for a moment.

"I also think it's dumb for university scientists to look down on the general public, as a lot do, I'm afraid."

The thought of having to act as though I was dumb for the rest of my life seemed terrible.

That would have been a little too dumb, even for me.