Jon writes:
If we find there was no Madame Curie, then we cannot have a 'God of Madame Curie'clearly.
Why not? Isn't the God of Madame Curie the same as the God of Gulliver? How do fictional references to a god make that god more or less real?
If the story of the Exodus was 100% accurate physically, I don't see how that adds to the plausibility of the God character in the story. Conversely, if the story was 100% false, I don't see how that subtracts from the plausibility of the God character.
To summarize, I don't see how you can connect the physical reality of the story to any metaphysical claims at all.
"I'm Rory Bellows, I tell you! And I got a lot of corroborating evidence... over here... by the throttle!"