Please don't abuse legal standards like this. Hearsay just means something heard secondhand, and while it's not normally admittable in a court of law, this doesn't make it "by definition" untrustworthy.
I beg the differ.
Anecdotal evidence, be it first-hand or whatever-hand, is known to be the lowest form of evidence and the least thrustworthy.
This is why a single piece of objective empirical evidence will instantly trump the "testimoney" of 200 "witnesses".
In the end, testimoney is not evidence. It is just the piling on of
claims.
When a "witness" says that he saw such and such do whatever action.... Then he is
making a claim about such and such doing whatever action!
Such a testimoney is NOT "evidence" that such and such actuall did whatever action!
It is a CLAIM.
Claims aren't evidence. Piling on even more claims, also isn't evidence!
Just not normally acceptable in the extremely controlled legal environment. If you miss a meeting at work and a friend takes notes for you, those notes are not "by definition" untrustworthy.
Except that they are.
Who guarantees you that his notes are complete? Accurate? That he didn't miss certain important points?
If you have 5 people taking notes independently in said meeting, do you think the end result when comparing those notes, will be exact matches?
I, for one, pretty much guarantee you that you'll find contradictions among the notes on at least one point.
Also Paul's testimony is not hearsay. He may have been hallucinating, but it's very much a firsthand account.
It's anecdotal.
Not to mention that the text you read today are, at best, copies of copies of translations of copies of translations of copies of copies,....
You are not reading the "first hand" account by Paul at all.
And, once more, even if you did - it would still be anecdotal testimoney. It would be, as explained above, a CLAIM - which is not evidence of itself.
It would be a claim in
need of evidence.