Gabriella,
No I want you to justify your claim that he claims he has objective evidence. But that's fine if you don't want to.
It’s not a disputed issue. He’s claimed it a lot, and no doubt he’ll claim it again. If I can be bothered I’ll trawl through to find the last time he did it, but he has done it – and several times too.
No - there is testimony that can be challenged but can't be tested for objective truth. But the testimony can still be taken as evidence.
Not as evidence for objective truths about the world it can’t. He claims to have it, but fails to grasp that to be evidence at all (as opposed to testimony, opinion etc) it would have to be investigable and testable.
I had a look and couldn't spot the word "forensics". What is it that you think I said involving forensics?
“My understanding is that there is an established legal principle that testimony under oath can be accepted as evidence (with a penalty for perjury if it is later proved that a person lied under oath).
Apart from legal situations…”