I used to wonder if I could possibly be retarded, because logic told me that if I was I’d be too retarded to realize it. (Apologies to those who don’t like the word. That’s what we called it then.)
But that was actually proof that you weren't retarded, because if you were, you wouldn't have been able to wonder about it.
But then again, if this insight hadn't occurred to you, maybe you really were retarded.
≤}B^)