Originally Posted by
Future17
But you said things can only exist when there is conclusive proof that they exist. My point is that lots of things have existed for long periods of time without people being aware of them, much less having conclusive proof of their existence.
Someone may well say in 50, 100 or 1000 years, with conclusive proof, that God always existed, we just couldn't see "him". If that were to happen, God won't have moved from non-existence into existence, just as America didn't when people became aware of it.
I don't really know whether any mythological creatures existed but, based on what I do know, I certainly wouldn't be able to state, for certain, that they didn't.