Can you explain the difference between:
- those who don't claim to know there's no god
- those who claim to know there's no god
I think the difference is quite easy to understand if you forget about emotionally-loaded fantasies like gods for a moment and consider more easy-going ones. Take the tooth fairy for example. Anybody who claims to know
there is no tooth fairy is clearly overplaying their evidence. You can't possibly know
that it doesn't exist, because it's near-impossible to prove a negative. So although you probably don't believe in the tooth fairy, you'd find it hard to claim that you know
it doesn't exist.
The same reasoning can apply to Zeus, Vishnu, Jehovah, and the rest of the bunch.