Testimony is Evidence

[LadyForCamus]

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.

No, it doesn't. Any eyewitness account is evidence. You are confusing the word evidence with the word proof. Evidence refers to pieces of information or facts that help us establish the truth of something. Proof is a conclusion about the truth of something after analyzing the evidence. Evidence is suggestive of a conclusion. Proof is concrete and conclusive. Proof can also have different thresholds: Anywhere from more likely than not (preponderance of the evidence), to beyond a reasonable doubt, to absolute. These are all arrived at by considering evidence.

Sure...eye witness testimony may very well be evidence, but it's not necessarily evidence for the particular claim it's being asserted as evidence for.

If I claim I spoke to the devil last night and he told me to do a square dance around Big Ben and then kill everyone, my testimony may actually be evidence that I'm a paranoid schizophrenic.