These are contextual. Some people could say “absolutely” or “for sure” or “obviously”, and yet they could appear arrogant instead of being persuasive.

If you’re going for persuasive frames, I think it’s best to frame an argument around empathy. If you can prove that you understand someone else’s problems, they’ll be more open to you and your proposed solution.

Of course, this is easier said than done.

“As you know, $claim”.

It works rather well in a lot of situations, where you want people to eat the claim being made without questioning it. Because to question it you’d need to admit for yourself “no, I don’t know it; is it true or false? Lemme think…”, and most people are not willing to entertain their own ignorance.

I consider it a dishonest approach, though. But that’s because usually I’m not too willing to use rhetorical devices.