Gravity doesn't exist. I don't need to prove that because it hasn't even been proven that gravity does exist.
Shape? We don't have that data. We are currently 2 dimensional in regards to Earth. We know a map. We can't comprehend a globe.
Size? Again, we are 2 dimensional. We only have the data that made it through the geographer. Past Antarctica could be anything from a barren icy wasteland to a tropical paradise.
Math only works under the assumption of a globe. So does science. If the earth is not a globe, it upends everything.
Space is mostly fake. The best consumer digital 📷 (*icon to denote not on a phone) cannot discern features even on Mars. It shows a strange, pulsating orb, no matter the atmospheric conditions.
And for that matter, the atmosphere is too tenuous to produce twinkling. The firmament keeps the air on earth. If there is any twinkling, it would be caused by the "waters above."
I don't know, but I didn't see any genuine interest from those 3. At least 30% of that thread is just them spewing nonsense and insulting people. Even if they were non-agents, anyone that insists on insulting others so fervently is either a child and/or would turn into a retarded "flat earth" soldier anyway. To my mind, they don't deserve your time.
There is one downside, though: if they are agents and no one engages their retarded straw man points, those comments are gobbled up by deceived globers as truth, because they reinforce their beliefs.
But to answer your question, I think the modus operandi of agents is to tire you with relentless straw manning and gaslighting, while those genuinely deceived will concede in the face of evidence, just like we did.
You are the one spewing nonsense and no one is buying your pretend low IQ act.
Bad fucking larpers