Do "flat-earthers" attempt to sail around the world to prove their theory? Would this support their belief in a flat Earth?

If they are honest flat earthers, and not total muppets, it’s hard to understand how they can keep failing to weigh the evidence against flat earth. Which may imply it comes down to some sort of faith gripped tight in their hands, refusing to let go.

Sad, really sad. And frustrating. What is wrong with people, I keep having to ask?

But in the face of compelling evidence, there are flat earthers who will reject it.

Nobody Wanted These Tiny Babies Because They Were Born Different - The Dodo - For Animal People

Long story short, no evidence has changed some flat earthers public position on flat earth.

Is it because they are trolls and not really flat earthers?

A Colorado pastor just paid to bring some flat earthers and globe earthers to see the 24 hour sun in Antarctica. People with flat earth channels. At least one of them admitted that there really is a 24 hour sun in Antartica. Some flat earthers said the existence of this would disprove flat earth. Now flat earthers are spamming all sorts of reasons why either this whole trip was fake, or that a 24 hour sun doesn’t disprove a flat earth.

I own a small solar company in Montana and might have to lay off most of my employees. I'm not hiding that from them. - Business Insider

Will, probably nothing, we knew this was going to happen.

Is it that their brains are incapable of rational appraisal of information and a desire to get to the truth by making the best informed decision they can?

What have we learned?

Why are there posts saying the T in LGBT should be dropped? With what is happening in the US and beyond against the trans community cause for concern that if this is accepted could it be deemed acceptable to start on the LGB community again?