You know, when a suspect of a crime has an alibi, proving he was living in Australia when a murder occurred in Florida, nobody need look at any other alleged evidence against him. It is what is called the "argumentum ad absurdam" or "reductio ad absurdum", meaning it has already been proved absurd and nothing else can change that.
The flat earth claim is absurd. I don't need to see any so-called evidence of that....because I know that when the sun rises upon a plane, the whole plain would see the sun at the same time. But on this earth, the sun is seen to rise in one location and due west 100 miles the sun is still below the horizon.
I think non-Catholics, and disgruntled, fallen-away Catholics, just come here to bring laughter upon Catholicism by posting such nonsense. Either that or they have Internet access from a mental institution.