How to beat a presupp at their own game

[The Grand Nudger]

Thanks for your reply and the time and effort you put in! I won't be able to respond to all your points so I apologize. Theists will say that God is the grounding for all facts and if we don't KNOW what is absolute (or ultimate) then we can't KNOW anything. It's incoherent. In Discord, this is the line of reasoning and just about every day, fellow atheists get stumped and just admit, well I don't know if there is an absolute and I think that is the honest position to take, but Darth will say the logical entailment is that it's all arbitrary under that worldview.

He would be wrong, then.  We don't have to know everything to know anything, and if we don't know or there isn't any ultimate whatsit, that doesn't effect any other thing that we do know.

The other issue is that, if I question Gods moral character, a theist will turn around and ask me how I can justify that in my worldview given that there is no absolute arbiter of morality in an atheists worldview. It's all subjective and arbitrary, Like if I say God is a genocidal psychopath, theists will say that in my worldview I can't really speak to Gods moral character, it's just gobbledygook,  or if I say God is immoral, the same thing - how do you know God is immoral, based on what ultimate or absolute standard?

I'm not equipped yet to really give a good defense, hence the questions and I'm up for learning more.

It sounds like this person doesn't know their ass from hole in the ground.  Imagining things about atheists and atheism in order to argue with those things.

You should probably start demanding his ultra standards, then the mega standards behind those, then the super standards behind those. After all, unless god has ultra mega super standards it can't know shit and everything is arbitrary under it's worldview.