How about accepting the fact that since so many things we’ve been told have been lie you start from square one and just assume you don’t know anything about that topic at all before even mustering the gumption to argue with anyone about it? They’ve given you links and books to read on the topic that they feel justify this seemingly outlandish view (based on what you’ve always assumed was true because you never heard anything different), have you picked up any of those books yet or do you just want to keep badgering them with “That doesn’t make any sense!” They’ve told you several times they can’t do the topic justice in a short post here but where you can read about it yourself so stop annoying everyone already and go read the damn cited material already. Jesus. That doesn’t make anyone a flat fucking earther it just makes you unwilling to do any real work for yourself. What do you want them to do, type out the whole damn book for you right here? They told you where to find it, if you’re so curious go to a damn library or follow their link and see if you can answer your own damn questions.