Until ye sail the arctic, pacific, hell all of them oceans, ye don't know that there is an edge to the earth! I however have found no edge other than the deck of my ship. Explain me how that do be possible on a placemat earth like you Cubers think.
This is the most ingenious response I think I've read in the forums as of yet.
OP, I don't think many FE's can give you a convincing answer. If you haven't been blown away by anything in the Wiki as of yet I'm not sure you'll find a convincing answer. There are however some interesting user forums that I've seen posted that attempt a much higher form of math to prove their point, I've seen them mentioned as "alternative FAQ's" you might be able to find them if you search that phrase through the sites search engine, if you quest for answers isn't met here maybe it well be met elsewhere on the internet? Just food for thought.
Best of luck in your quest for the truth OP.