Something for the flat Earthers to think about
I'm doubtful anything would convince them, unless it was another delusion that overrides this one.
The resolve behind the flat earth belief comes from a certainty that he, who knows the earth is flat, knows something others do not.
When one knows very little, an inflated sense of knowledge gives him or her a sense of power. Conspiracy theorists, in my experience, feel they have superior intellect.
In fact, they just sucked on one too many helium balloons.
I like your new profile picture!
You are being rational. You'll never convince them. They'll think it's a conspiracy.