My ex wife's son, my ex step son who I am still close with, thinks the earth is flat and keeps sending me all this BS about it trying to convince me so. Finally, he came across with this bible said this and that stuff and I figured out what his angle was. Poor kid never completed any school past the age of 14 and spent his Junior and High school years in jail. He is a good guy and has children all over the place most of which he supports and somehow ended up believing in sky fairies and flat earth BS. I've tried to explain the math to him in multiple ways but he keeps sending me hicks from red states perspective and made up math on the topic. What can a guy do to help him out?