1 person retelling of an account can be a lie. 2 or more people, independent of one another, retelling the same account gives more credence to an account, yes. But note that this depends if they're independent of one another. But this doesn't even approach the issue of credulity, i.e. people echo someone else's account as if they were their own such that they believe something without real evidence to back up a claim.
To declare something as evidence takes a whole canopy of references, not just eye-witness accounts. Stuff like repeatable observations/experiments, several independent observers, blind testing and so on.
To declare something as evidence takes a whole canopy of references, not just eye-witness accounts. Stuff like repeatable observations/experiments, several independent observers, blind testing and so on.
