So someone I know has been posting some articles on Facebook and it turns out she is a massive flat earther- completely convinced the earth isn't a sphere but a flat circle, no gravity, sun the same size as the moon etc. When we have clear evidence this isn't the case how can people be so sure they are right? I'm just totally baffled by it. How on earth can you reason with someone who is so deluded and claims or your facts are propaganda and that NASA have tricked us to keep us all feeling inferior!