There's no such mechanisms in place to ensure logical consistency and coherance of made claims.
Thus the onus is on you to quickly realize that the other party "doesn't have what it takes" and bail out, or you're arguing with a person that doesn't have the mental capacity to recognize syntax errors and subtle bugs, they are simply interested in arriving at their destination and couldn't care less if they arrived there with an unbroken chain of valid chess moves.
> I don't think this is true. There are times when I do think it's true, and when I start feeling that way I know it's time to step back because I can no longer engage constructively.
I love how you don't even care if it's true, merely how you think at any given moment (and this changes with mood) and how those thoughts makes you feel.
If you're unable to entertain the idea significant amount of people don't have "what it takes" (which is a fact, btw), have you ever been able to engage constructively?
One of the hallmarks of a person who isn't interested in playing chess is a person who focuses not on what IS true, but "what they think" or "how they start feeling" about chess moves at any given time, etc. Ie. focus is about vibes.