This player has entered a biography, as you can see. It is actually an autobiography, because this player wrote it. You know the player has entered an autobiography, because you are reading this. How do I know? Well, this statement applies only to those who have read this. If you didn't read this, you wouldn't have known, and thus it wouldn't have existed for you. But it exists for you and everyone who has, is, and will read my autobiography.
P.S. This isn't a biography, because I haven't written anything about myself. So thus I have not entered a biography, which means I lied. Thus, the original text, This player has not entered a biography, was true.