Stop pushing things over to the people listening to reason, not faith (there are exceptions). There are actually people right now that think that the world is flat! Are you really trying to tell me that people didn't think it was flat back then?
Anyone with basic education would know about Eratosthenes, who calculated the Earth's radius in Hellenist Egypt before Jesus. But if it was an atheist hoax, it was too successful since now the Christians on this forum have embraced it.
That is basic education? No. I doubt that more than a handful people know that.