No time to read the entire thread, which I'm sure is fascinating, but I do currently happen to be reading Alvin Plantinga, who is one of the leading philosophers of the past 50 years as well as a leading Christian apologist. His specialty is
epistemology, which is basically the branch of philosophy dealing with how we "know" things.
Plantinga points out that you can "believe" something to be true, and it can in fact be true, but your belief may be based on entirely false reasoning or reasons. It is pure dumb luck that your belief corresponds to the truth. Such a belief is "unjustified" (or lacks "warrant" in Plantinga's terminology). To qualify as "knowledge," it must be based on sound reasoning and sound reasons.
You believe that your car is going to break down on the highway to Phoenix. You believe this because you are mentally disturbed and believe the highway is haunted by demons that pick on Fords. I believe it is going to break down on the highway to Phoenix too. I believe this because I know the mechanic at the Ford dealer forgot to put in any new oil when you thought he had changed the oil. Your car does break down. Both beliefs were correct, but only mine was based on sound reasoning and sound reasons and had warrant.
Plantinga believes that some beliefs are "properly basic" and do not require any evidence or proofs. His greatest contribution to philosophy has been his argument that a belief in God can be "properly basic" and have "warrant" even without supporting evidence and arguments. Belief in God is not mandatory, of course - atheists are not necessarily lesser thinkers because they don't believe in God - but a believer can legitimately claim to have a justified belief in God independent of any evidence or arguments.
My thinking, influenced by my own experiences and the writings of many religious sages, has always been that
intuition is a higher form of "knowing" than deduction and is the means by which we approach God. This is basically how Plantinga describes
faith - a higher form of knowing independent of evidence and arguments. Related to this is the concept of the
sensus divinitatis ("sense of divinity") that Calvin and others have suggested all humans possess.
So whether you want to say you "know" of God through intuition, faith, the sensus divinitatis or the calling of the Holy Spirit, the fact is that speaking of "knowing" in this way, independent of evidence and arguments, is philosophically acceptable. It is not the same sort of knowing as knowing that your Ford is in your garage, of course, but it is a species of knowing that goes beyond mere "hoping" (or, as atheists like to say, "magical thinking").
The book of Plantinga's that I happen to be reading - which is one of his most interesting and relatively easy to follow (as serious philosophy goes) - is
Where the Conflict Really Lies: Science, Religion, and Naturalism,
https://www.amazon.com/Where-Conflict-Really-Lies-Naturalism/dp/0199812098.