Bob: For the record Keith Parsons does NOT say that no evidence would convince him. Quite the contrary, he gives what he thinks would have been a convincing scenario. See his scenario at 1:39. It's based on this passage by N. R. Hanson:
'Next Tuesday morning, just after breakfast, all of us in this one world will be knocked to our knees by a percussive and ear-shattering thunderclap. Snow swirls, leaves drop from trees, the earth heaves and buckles, buildings topple and towers tumble.
The sky is ablaze with an eerie silvery light, and just then, as all the people of this world look up, the heavens open, and the clouds pull apart, revealing an unbelievably radiant and immense Zeus-like figure towering over us like a hundred Everests.
He frowns darkly as lighting plays over the features of his Michelangeloid face, and then he points down, at me, and explains for every man, woman and child to hear, "I've had quite enough of your too-clever logic chopping and word-watching in matters of theology. Be assured, Hanson, that I most certainly do exist!" '
Once, after reading a paper Keith wrote arguing against miracles way back in 1985, I asked Keith to assume that I were God, and wanted to know what kind of evidence he would find convincing. He answered by saying "If the galaxies in the Virgo cluster were to spell out the words "Turn or Burn, Parsons This Means You, I'd turn."