I was going by what you'd said in a previous post, Steve, when you dismissed the notion of different kinds of evidence as not worth debating, as there was only one kind. My point was that when it came to stuff like music, that really didn't apply. With which you essentially agree. Maybe there's a verbal difference around our use of the word "evidence".
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I've heard "born again" used often enough in the context of politics for example when you get former Marxists turning up on the right of the Tory party, and also in other contexts, such as gender reassignment.

It's a metaphor to start with, for a total upheaval in how someone sees the world, as valid for a one time Christian becoming an atheist as it would be for an atheist becoming a Christian.