When person A says, "Hey, I think this Japanese here says [this], but I'm not sure. Could someone clarify?" the correct response is NOT "[what A just said, but in a way that's ridiculously hard to understand], so therefore [thing that is clearly untrue]." And then follow it up with "Oh, well then I guess [the exact opposite of what I just said]."
IF YOU DON'T KNOW, KEEP YOUR MOUTH SHUT.
IF YOU DON'T KNOW, KEEP YOUR MOUTH SHUT.