Hello. I'm brand new to this board. I want to share my experiences and get some reassurance. I've been an evangelical Christian (Cavalry Chapel) since I was a teen (nearly 20 years ago). I converted out of Catholicism with my mother. I made a good friend in the church. We play Dungeons and Dragons together and stuff. Anyway, about a year ago, my friend started entertaining notions of Flat Eartherism. I moved out of state for a job and we barely talk anymore. Last week, my mother texted that she now believed in FE. I answered all her questions about gravity, air pressure, electromagnetism, etc. but she persisted in sending me several of those annoying YouTube videos a day. I asked her to stop and we've put it behind us, but I'm collecting proofs for my own peace of mind. I'm willing to argue on her terms, that all NASA photos are fake, all other photos are doctored or fish-eye, and any geology/seismic data is fake. She accepts the Gleason Map, so I point out the Southern Hemisphere and told her to ask an Australian, South African, Chilean, or Argentinian if that's what their country looks like. I showed her a century of logs and training manuals of ship captains, overland drivers, and aircraft pilots all assuming and verifying round-earth measurements. They couldn't all be in on a conspiracy. They're all practical people earning money or fighting in wars. Finally, I collected centuries of books and articles by cartographers agonizing about how to represent a globe earth on a flat map. Why would they waste all that time on an error if the flat earth were so easy to see? The big conundrum I have is that her final authority is the Bible. As long as she interprets "firmament" and "pillars" and "cannot be moved" literally, her whole faith in God's promises will be shaken if she doubts.