> These people do not listen to reason; they didn't reason themselves into the position and you cannot reason them out of it. The flat earthers doing the "experiments" keep coming up with reasons to keep on believing, even when their experiments are so blinkered and janky they show either nothing at all or that they are, in fact, wrong.

I’m late to the party here, but I recall reading (or watching) about one flat earther devising a somewhat novel, and actually very solid experiment for determining the roundness of the earth. Unfortunately, they thought their methods or testing apparatuses were flawed when the results indicated that the earth was in fact pretty roundish. They’ll be back with a fresh experiment, no doubt, to confirm their pre-existing notions.