Absolutely. For as long as the internet has been around, there has been this notion that someone asking questions is not only entitled to an explanation, but that it must fit into a brief response, the asker must be able to understand the explanation, and they must be thoroughly convinced by it. If none of these criteria are met, the asker concludes that the explanation does not exist or is wrong.

It is a fallacy that is quite obvious with just a little thought. Example: "Someone prove to me in a written reply here that Fermat's Last Theorem is true. If you can't, then I submit that it's false." Complete nonsense.