I believe strongly that there is no gods, but do I know for sure there is no gods. I have no evidence that there Isn't a god just a much as they have no evidence that there is a god, so why should I try to persuade them that there beliefs are wrong.
You can't have, and therefore don't need, evidence for a negative.
@Gareth Wrong. You can have evidence for negative assertions. Negative assertions are as easily proven as positive assertions.
@WilliamFleming How rude. So, prove there are no unicorns.
I didn’t mean it to be rude, but that thing about not being able to prove a negative is nothing but myth.
It is sometimes difficult or impossible to prove that something exists or does not exist with absolute certainty. Proof enough for me is that the unicorn is DEFINED in the dictionary as mythical.