Having made conversation with someone is not “knowing” them…
Having heard of someone during a previous conversation, does not mean you “know” them…
In your question, “Do you know so and so?” the word “know” is not being used correctly.
You are using the word “know” interchangeably with the word “acquainted”
In theological sense, the word “know” is borne out of the word “knowledge” which has connotations with comprehension and understanding.
Knowledge, in a theological sense, is a process of exploration and intimacy and infusion…
You can do as much exploration, infusing, etc with God, but you will never fully “know” Him because He will always be greater than you.
Of course, I know God, in that I am acquainted with Him. If someone asked me, “Do you know God?” I’ll say “Yeah, the Supreme Creator”
But this is not “KNOWLEDGE”, this is “ACQUAINTANCE”
…they should not be confused
.