Climb up a mountain, get on an air plane, get to a significant height with a clear line of sight to the horizon. You can easily tell the earth isn't flat. Get a overly large pendulum hanging device and hang a pendulum from ~75 feet, see what naturally happens without administering force. Visit a foreign country via literally any method, provided you cross an ocean. Look up at the stars in the sky and observe the pattern for many months. Look at satellites crossing the path every X amount of hours. If you honestly believe in a flat earth... Lord have mercy on your soul. If you are religious, and you think the Bible in some way promotes flat earth, try again, the Lord is the creator of the rolling spheres. No sane person believes that the earth is flat. Someone is attacking this movement, THIS is there attack method. Stop giving credence to the retards who do 0 research, make crap up in their heads, and preach it like it's religious.