Is There Such a Thing as a Dumb Question? Oops

It's often been conjectured, though I've seen no one prove it. What do we need, from our lexicon, to remove it? To disprove it, it would be sufficient - more than ample, simply to supply a single counterexample. Now, thank God, we have it, and it's indisputable. A question who's stupidity is immutable. So now, friends and colleagues, I offer this suggestion: let's no longer say, "there's no such thing as a dumb question".