This term originated on the Relic forums back in 1999-2000 when a user there named Omnislash regularly used this method to argue with other forum members.
I never kid!
"if that were the case.."
The case? A suitcase?!?!
"then why does it seem"
Seems madame? I know not seems..
"like you're not making sense?"
I use sense, but I don't claim to make anything!