I checked the difference between anywhere and everywhere in the Longman dictionary. I have understood that when the place is not important we have to use anywhere for example: You can find a man ...
The context is as follows. I say that X is true. The (dismissive) response I receive is "Anyone knows that". Is that a complete sentence? Yes, it is grammatical. Yes,it has some semblance of ...
Is the tournament open for "anyone" or "everyone"?