Not again! How many times do you need this explaining?
The default position is always to not accept a claim unless sufficient grounds are given to do so. So we default to no gods, no ghosts, no alien abductions, no atoms, no electromagnetic radiation, no black holes, no anything unless there are good reasons to accept it.
This really isn't hard. The alternative would be insanity (literally: having to take everything seriously without good reason).
And, no, it doesn't matter a jot how something is defined (empirically or not), the same principle must apply: unless there are good reasons to accept something, then it is rational not to accept it.
Citations please.
But while we are waiting lets think about it.
Let's take the Dragon in the room crock. If I declare there is no dragon in the room then I have positively asserted and have a burden of proof. My proof of absence is that none of the empirically detected properties of a Dragon have been empirically detected.
If I claim the default position, as you said earlier, then you have positively asserted, with the burden of proof that entails. Whereas it easy to detect presence or absence of Dragons, the lack of empirically detectable properties of God put Dragons, leprechauns etc in a different category.
Since you are positively asserting the so called default position you are making a claim. What Good reason then do you have for no alien abductions? and what Good reasons do you believe you have for no God.
Can you give a citation for what constitutes ''good reason'' and ''sufficient grounds'' namely one we can all agree on rather than just the ''folies a plusieures'' of antitheism?
If you want a good reason for God it's the ownership by dissenting atheists of ''Contingency without necessity'' and that other crock ''things being both contingent and necessary.
Rather than fucking about with the default position being no atoms, people who we celebrate today went right ahead and proposed them.
I think we will find that ''no good reason'' will turn out to mean 'not empiricism' and 'not physicalism'