Discussing what actually exists would be through ontology:
“Ontology is the branch of philosophy that studies concepts such as existence, being, becoming, and reality.”
Sure, ontology cannot “prove” something exists, but it does provide a rational basis to believe something exists. Granted, ontological arguments are quite abstract, but they are respected tools nonetheless among scholars.
But, all of this is not directly related to this thread. Since I’m not invoking any supernatural causation in this thread, the only thing we’re looking at is empirical evidence and how they fit with the claims of the Bible. So, continuing on with archaeological evidence…