I think that starting off acting somewhat lower status and underplaying your confidence in the start, at least, can work. It makes it feel less like an attack on the other person and can maybe make it feel more like they’re awesome rationalists for being so quick to see the evidence when it’s presented (assuming, of course, that you’re right.) And if you’re wrong, again, it won’t feel like an attack on them, and they’ll be more likely to present why they’re right in a way that shows your idea as an honest, easily-made mistake instead of harshly steamrolling your arguments and making you look like a dullard.
ETA: If you are right, but the person doesn’t see it after your first comment, then the “awesome rationalist quickly accepting evidence” feeling can take a hit. To make them still feel that, it might be a good idea to extrapolate/present more points and apologize for not being clear. Just a quick “Ah, sorry, I wasn’t clear. What I meant to say was blah blah blah” should work. Keeping deferential should be remembered. And if they’re right, and you didn’t understand it, hopefully caution will have prevented it from escalating any. The more of a status war it becomes/The harder it is to save face, the harder it becomes to convince the other person and get them to agree. Though there’s always the chance that you convince them but they won’t admit it because they’ll lose face.
(“You” is used as one/anyone/people in general, of course.)
I think that starting off acting somewhat lower status and underplaying your confidence in the start, at least, can work. It makes it feel less like an attack on the other person and can maybe make it feel more like they’re awesome rationalists for being so quick to see the evidence when it’s presented (assuming, of course, that you’re right.) And if you’re wrong, again, it won’t feel like an attack on them, and they’ll be more likely to present why they’re right in a way that shows your idea as an honest, easily-made mistake instead of harshly steamrolling your arguments and making you look like a dullard.
ETA: If you are right, but the person doesn’t see it after your first comment, then the “awesome rationalist quickly accepting evidence” feeling can take a hit. To make them still feel that, it might be a good idea to extrapolate/present more points and apologize for not being clear. Just a quick “Ah, sorry, I wasn’t clear. What I meant to say was blah blah blah” should work. Keeping deferential should be remembered. And if they’re right, and you didn’t understand it, hopefully caution will have prevented it from escalating any. The more of a status war it becomes/The harder it is to save face, the harder it becomes to convince the other person and get them to agree. Though there’s always the chance that you convince them but they won’t admit it because they’ll lose face.
(“You” is used as one/anyone/people in general, of course.)