The answer is, we don’t KNOW. No one does.
She’s really an agnostic, she just doesn’t know it.
Being an agnostic is the most logical stand given the available evidence.
Actually, the fact that everyone wonders about the issue, is proof that we do know, we just do not want to accept.
Ultimately, every knee will bow.
The claim that you don’t know happens when your philosophy plays games with your intuition.
There comes a point at which one who wishes to observe finds that it needs a blinder faith to believe there is no God.
Hell, among other things, is a state of affairs that we embrace for ourselves when we let our philosophy stop our belief. Because then anything that might be a manifestation of God, rather than being worthy of followed up on for more attention, becomes perforce relegated to the “suspect” bin.
Any real God who wants relationship is not going to brook this kind of treatment.
The actual problem was documented well in the fall of humanity in Eden. We wanted a private righteousness and got it, but at the cost of divorcing ourselves from belief.