an oxymoron involving sarcasm and an intent not to offend.... most of the time
Person 1: You are a fascinating duo, did you two know that?
Person 2:No. We didn't know that. Person 3, did you not know that? (note sarcasm)
Person 1: I was just pointing out the obvious, jeez. >_>
Person 2: It was nice sarcasm, it there's such a thing....