The term “unassailable proof” is a tautology; the word ‘proof’ is sufficient in itself. Subjective perceptions of knowing God don’t by their personal nature offer sufficient proof to others to persuade or prove. While that knowledge may seem more real to its subscriber, the modern world requires objective proofs of our apologetics. This is the obligation we have that comes on the heels of all the benefits we glean from modern science and critical reason. After all, without science, we’d spend 12 hours a week doing laundry, think single cell flagellum were evil spirits, and never travel more than 30 miles from our village - not to mention being toothless by 25.