-
It can't be flat because the cats would have pushed everything off the edge
I just came here to post this as the only rational response and I'm glad that its already been made
The other, slightly more useful response I'll add is to plug my favorite book;
The Universe: from Flat Earth to Quasar
https://www.amazon.co.uk/Universe-Earth-Quasar-Isaac-Asimov/dp/038001596XIt explains in fairly simple logic, the step by step deduction that gets you from flat Earth to 60s Science. It gets a bit complicated past Hubble and the 30s, but up till then it is really straight forward (considering), and a great read
It can't be flat because the cats would have pushed everything off the edge. Or something like that.