You don't believe in science, you understand it

[TRANSPONDER]

And if they did, it would simply have first cause retreat to some postulated place outside reality where a believed in god could still lurk.

First gods lived in forests or streams. Then when they got a bit better known and there were no gods found, they were banished to the tops of mountains or the depths of the sea. When even that didn't look feasible, then a throne on top of the sky and a gloomy cavern under the earth.

Now heaven and indeed Hell has to be pushed further and further away and both made nicely invisible and indeed non physical to avoid any risk of not being detected where they ought to be.

And if and when we have looked everywhere in the universe (collecting our two oreos in the process) then the question will be moved back to 'Have you looked everywhere outside the universe?'

It is an illogical and irrelevant argument, because the only god that concerns us is one here with us. If it demonstrably isn't, then it concerns us no more than some alien civilization that might, statistically, be believed to exist 'somewhere in the universe'.

It is actually no more than a rhetorical trick for trying to wangle atheism into a false position where it can be accused of being illogical (it requires that atheism be accused of denying the possibility of any kind of 'God' or this rhetorical swindle doesn't work) so it can be discredited on a technicality,which is great because theism can't beat it in a fair fight.