Spud,
I wasn't suggesting that an anecdotal report is enough to prove for us whether a story is true, I meant that people in the story (in John 9) could verify it. Likewise, a reader of the first copy of Mark 10 could check for himself if Bartimaeus had been healed, which would give him enough reason to believe the rest of Mark's account.
Which would still tell you nothing about whether a miracle had occurred though.
If two or more people did this independently, then that would be the basis on which subsequent generations could believe the account.
Two or more people witnessing someone having an epileptic fit would likely have said he was possessed by demons too, but that tells us nothing about whether the sufferer was in fact possessed by demons.
Like you say, it doesn't prove it for us, as it assumes no mistakes or lies, but since you asked how, if it was true, we could know it, I'm suggesting this as the basis on which we can be confident of it. Because at the end of the day, I think, whether we believe in God and miracles or not is a faith position,...
No, believing in god is a faith position; not believing in god isn’t. Believing god doesn’t exist on the other hand would be a faith position, but that’s a different matter.
...and for me belief is more fruitful than unbelief.
Which is the
argumentum ad consequentiam fallacy. Finding a truth claim "fruitful" is not an indicator of whether or not it's true. I might find believing in leprechauns fruitful too. So what though?
Just out of interest, try to imagine that you had no
a priori religious faith and instead came to the Bible stories dispassionately. Are you really suggesting that the accounts you refer to with all their attendant problems evidentially would be sufficient to persuade you that miracles had actually occurred nonetheless?