For miscellaneous discussions and remarks not suitable for top-level posts even in the Discussion section, let alone in Main.
(Naturally, if a discussion gets too unwieldy, celebrate by turning it into a top-level post, just like in the good old days.)
What do you mean, then?
It's rather safe to assume that anyone interested in the questions has the following preferences:
The first, second, and fourth of those are well served by noting the difference between being right and being known to be right, and not worrying about the latter in situations where the other person doesn't value objective rightness. That basically describes my personal policy, anyway - I have a strong habit of going "oh, ok" and dropping the subject at the first sign of annoyance on the other person's part in such cases, unless there's something at stake beyond just their knowledge, and that seems to work well enough.