I crushed that idea and you know it. Flat earth is nothing but myth and bigotry.
But all the work from ancient times indicates their world view was of a flat earth and a hemispherical dome "cosmos". The evidence is clear on that.
I notice you never did find any factual support for your assertions and were actually arguing what was known in the 1400s! at one point.
It just was not a very good try.
Let us know when you have an answer to that. Till then it goes in the collection of other arguments you have lost badly.