Giving someone with a conflict of interest good faith is extremely unwise. I advise even for you never to do it.

In essence you can say my faith in him is 50% not 100% as good faith seems to imply. So with 50% faith, engagement is still has value. I never met a person who never lied, so every single person I've ever talked to in my life I technically never had 100% good faith towards. I expect everyone to lie and be untrustworthy at some point. For some people it's big things, for other people it's minor white lies. For someone with a conflict of interest I'd be more careful.

Additionally even someone completely untrustworthy can still be communicated with. You can still glean information from such a person by observing his actions. For example if dang censors this thread by deleting the whole thing, that would say a lot. Him not deleting the thread also says a lot.

What I don't understand about you is how you can say you don't "understand" something and then suddenly say "good evening" as if you're leaving. Wouldn't the goal be for you to "stay" and "understand" Or is the goal simply to debate and win or leave if you can't win?