In a debate between Christian apologist Vincent Cheung and atheist Derek Sanson, Cheung was pressing Sanson to provide an explanation for his claim that all knowledge comes externally by way of sense perception. That is when Cheung delivered this classic line;
Sanson: It’s self-evident that a sense is a sense, you don’t even have to have a word for it, it is awareness.
Cheung: Of course it is self-evident that a sense is a sense, just like a dog is a dog, a Derek is a Derek, and a moron and a moron.
But what is a moron? Who is a moron? You are!
So what is a sensation?
This helpful and entertaining debate can be found here.