If another valid explanation exists and can’t be ruled out (especially when that explanation is even supported by evidence), then it isn’t proven that a shock happened.

Completely agree. I asked you for what that valid explanation was, and you said that it's possible that the collar had no shock function. I pointed out that it's been abundantly proven that the model of shock collar he showed does have a shock function, and then you shifted to claiming that it's possible that he just didn't know it had a shock function. So in other words, an inconsistent and shifting explanation which is totally fantastical, questing about in the search for some kind of hare-brained logic which exonerates Hasan even if it makes no sense. Which is roughly what I expected lol. I have seen this type of logic before from other Hasan stans. I do commend you for not falling back on claiming that I am the brainwashed one because I obviously come from LSF or I'm a Destiny watcher or whatevernot.

a lot of this discussion has shifted away from evidence and into speculation about people’s motives or behavior

On your side, yes. After I showed you videos of the exact model of collar, images illustrating in detail how Hasan doctored it, and video of him behaving abusively towards dogs in a way that isn't up for debate, you shifted away from the factual landscape and said you would "not respond to every point." Yes, I think tactically that's a good idea on your part, if you're trying to cling to this world model where Hasan is not a dog abuser who lies about it. That's pretty much all you can fall back on I think.