Does it ever occur to you to just concede for once and save so nich time and effort: ‘No, sorry, I don’t have a source for my claim, I simply made a conjecture that I believe to be correct’.
I bet it never even crossed your mind because you’re so goddamned sure of yourself since apparently ‘you don’t live under a rock’.
Sure, go ahead by all means, or you could take this as an opportunity to learn and grow as a person.