So if we don't know then it doesn't exist or didn't happen? That's interesting.
No.
Rather: if there is no evidence then the existence isn't assumed.
Which, for all
practical reasons and purposes, comes down to assuming non-existence.
As an analogy, consider the invisible rocks that block your way on the highway.
You likely don't believe they are there and that you'll crash into them. The reason you don't assume the existence of these rocks, is the total lack of evidence to support such an idea.
So you don't assume their existance.
Meaning that for
practical reasons and purposes, you assume no such rocks are there.
That's why you don't slam your breaks or change lanes and instead, just continue driving.
Does that mean that you can prove (at the time you make the decision to drive on, or rather: that you don't decide to slam your breaks) the rocks aren't there / don't exist?
Nope.
It just means that the lack of evidence FOR the claim, is enough for you to continue on assuming the claim isn't true. And thus far more likely false. So likely in fact, that you happily speed towards said spot at 100 miles an hour without even being worried - not even a little bit. In fact, if you have a reaction, it's probably laughter at the expense of the one who claimed the presence of said rocks.
How is an invisible god different from the invisible rocks?
Or does it simply mean we aren't aware of it yet? If we aren't aware of something does that mean it isn't possible?
Is it possible for the invisible rocks to block your way?
Do you even care? Does that question keep you awake at night? Does it make you switch lanes or slam your breaks?
No? Then why would pretty much the same question concerning an invisible god be any different?
The day someone brings some rational evidence to support the invisible rocks / god, is the day I'll care about that question.