Hermione really does get it. Don’t waste your time trying to prove a negative, it simply can’t happen. But as she states, it clearly makes more sense to go with the probable until you have reason not to. (William of Ockham speaking through Hermione)
The last paragraph of this page, clearly from a Harry Potter book, was quoted by Christopher Hitchen’s in his essay collection Arguably. I’d like to use it, but I need the name of the Harry Potter book and the page number for the quote. Full reference, please. There are no prizes except the blessing of Ceiling Cat.
What this shows is that even Hermione can refute that argument.