by jimwalton » Thu Jun 20, 2013 1:56 pm
That's where the rub comes in, then. Since a miracle, by ANY definition, is a once-only, nonrecurring event, it is outside the scope of science (which can only observe and test recurring sequences) and naturalistic evidence. Miracles can only be proven in two ways: (1) that they can be shown to be logically consistent with the physical world—the way things are, or (2) by enough corroborating, credible eyewitnesses to substantiate the claim being made.
If I put $20 in your pocket today, and then another $20 in there tomorrow, logic and reason would tell me that there will be $40 in your pocket. And of course that's true, provided that no one has meddled in your pocket. So the first thing to notice is whether your presuppositions have ruled out all meddling by definition. In that case, of course it's impossible to prove. The second thing to notice is that nature of full of once-only, non-recurring events, such as the cosmic blast that happened in Russia this year. It would be sort of foolish for a group of scientists to gather there saying, "C'mon, do it again!"
As far as the second, if you have enough trustworthy people whose eyewitness accounts corroborate with each other, even though the event may not repeat, it could be considered to be accepted as reality.
No matter how you cut it, it's a matter of faith. If you believe (by your presuppositions) that "meddling" is impossible, it's impossible to prove, but it's where you hang your hat. If the next guy "believes" in an open system, where there are spiritual forces (undetectable by science), and meddling is possible, it's also impossible to prove, but it's as reasonable a choice given the alternatives.
It's the same with eyewitnesses. If a large group of people claim to have seen a UFO, you can believe they did or believe they are a bunch of hallucinatory lunatics.
Can anyone prove that a once-only nonrecurring event is a miracle from God or not? No, because either way it's an interpretation of what you've seen or experienced. We all decide based on what we determine to be consistency with our understanding of the world and the evidences on which we build those understandings.