Maybe I thought it was a dumb idea all on its own.

Where did you ever get a dumb idea like that?

Your own dumb ideas; we all have them, even you.

"It really was a dumb idea to come here without powers."

And sometimes the really dumb idea that you had could be a good piece of music.

No one was ever upbraided for having a dumb idea.

Chuck is a good guy, but sometimes he has the dumbest ideas ever thought up by a human.

Maybe it was a dumb idea, trying to fight this many.

It's not thrown out as some kind of dumb idea.

Which is a clearly dumb idea to start with, because of the 400ppm issue.