[InsideOutSanta]

>I just take issue with people confidently stating that it's been proven false

There is no need to "prove Atlantis false" since there is no evidence for its existence. The only "evidence" is Plato, but if you read Plato, it's pretty clear that he is not talking about a real place, but making up Atlantis to make a point. So the onus is on the people who believe in Atlantis to provide compelling evidence that they are right, not on everybody else to disprove it.

Imagine you live 3000 years in the future, and you read Harry Potter. You assume that it describes real events and that Hogwarts is real. Most people look at the book and conclude it is fiction, but you disagree. Is it a compelling argument for you to say, "Well, unless they prove that there is no structure like Hogwarts anywhere on earth, I take issue with people confidently stating that Harry Potter is fiction"?

I don't think it is. I think the reasonable position is to state that Harry Potter is fictional confidently, and only reconsider that opinion when people provide compelling evidence that it is not.