Reasons why the Earth is flat:
1) Gravity on Earth is higher than other planets of comparable size. Why? Well, that is because the Earth is actually spining fast, simulating stronger gravity. OBVIOUSLY the shape the Earth would have to be in to have such high gravity would be a flat shape, not a curved one.
2) There are no dark spots when the Earth moves, prove me wrong.
3) Er, go here for more info: http://theflatearthsociety.org/cms/.
Discuss.