How is it a fallacy?!?! He told me to vote (told me what to do), I said, you first prove Concave Hollow Earth false (basically told him, if you want me to do something, than you do something first).
I also didn't say, he was obligated to prove the concave hollow earth false, but instructed him to do something first, before I did what he wanted.
So, it looks like your statement is a fallacy in this circumstance, but like I said before, nobody really listens to what I say anyways, why should you? lol
It's pretty sad, that nobody could though. People are so quick to disprove flat earth false, maybe, just maybe there is truth in the Concave Hollow Earth....