What does is mean to be a      "Flat Earther"

First and foremost none of us are claiming to have all the answers, in fact that is exactly the problem with the heliocentric model of Earth. It is rife with assumptions, mathematical impossibilities and a complete contradiction to Natural Law. Simply "Flat Earthers" know through the use of the scientific method and basic common sense that the given measurements of the oblate spheroid earth are incorrect. Tie this is with the fact that there are NO experiments that support this mathematical model. We're not here to argue models, we're here to discover the truth of reality.

"Today's scientists have substituted mathematics for experiments, and the wander off through equation after equation, and eventually build a structure which has no relation to reality".  -Nikola Tesla-