So your standard of truth is your reasoning.<quoted text>Of course I could be wrong about any of the thousands of gods that have ever been worshipped. Zeus could show himself tomorrow for all we know.
But since there is not now, nor has there ever been, any proof that any of those gods ever existed, I'm not really that worried about it.
I'm an atheist, I don't believe that gods exist - just like I don't believe in the Tooth Fairy or unicorns or leprechauns. I fail to see why this is so complicated.
Do you presuppose anything when you reason?