It's still my choice to believe someone or not.
I agree. When he told me that, I thought it was a dumb decision. It's still a choice, though. The gun and words didn't make it for him.
This is the real world and all of that plays into our choice to believe or not.
What bothers me the most is that there can be tons clues in the game that the guy isn't trustworthy and you should never believe him, but if he mind control persuasions me, I'll trust him. That's a reality break of the 1st order. It's a nonsensical result. The player should ultimately make that decision. A successful roll on one side or the other can influence the player, but it can't make his decision for him. At least it shouldn't.
I've walked out of a game where that sort of thing was happening.
Opposed mechanics should have influence, but should not dictate social situations.