Just how cold IS the South Pole, anyway?

I had a rather eye opening experience at work earlier this week. During lunch Monday night, I randomly decided to try to convince my co-worker Joyce that it was actually really hot at the South Pole, because (obviously) the planet just gets hotter and hotter the farther south you go. Everyone else chimed in on my side when she tried to argue with me, in what I had assumed at the time was just them going along with the joke, only to later have Paul come up to me later that night and tell me another of our co-workers had said it was actually the opposite, which I of course quickly sneered at and started mocking our stupid joke-ruining co-worker for being dumb. I went home feeling rather proud of myself for having managed to fool not one but two co-workers about something that, quite frankly, they should have known since before elementary school. Of course, that wasn't the end of it, as tonight I was confronted by yet another co-worker who had been joining in with me at the lunch table, Damien, who said he had seen a map at school this past morning and the South Pole was actually freezing cold, not hot. Apparently I have really impressive oratory skills that I just hadn't discovered up to now, for I have now learned that I can convince my really really stupid co-workers about anything.

Just to get a group project out of this, what really absurd things have the rest of you managed to convince other people of? If you can't think of anything of real quality, I may assign dumb things for you all to fool people with, to help further our proud nation's spiral into idiocy. It shall be wonderful.