I’ve always had difficulty tolerating overt displays of stupidity, and it finally came to a head with one elder in particular (a kind man, but not the brightest bulb on the tree)…
…when he effectively parroted the old creationist idea that dinosaurs and humans were contemporaries.
I piped up, “Then why are there no cave paintings of them? Why are there no human remains in the same layers of rock as dinosaur fossils?” (Note: I did not ask this in a mean or confrontational way. Not my style.)
The deer-in-the-headlights look clearly indicated that these things had never once occurred to him, but to his credit, he acknowledged that they were perfectly valid questions.
This was in front of the entire bookstudy group, BTW, and I never got in trouble for it, either.