simply be unbearably correct and defensible about everything
Nice work if you can get it :D
But that's the thing: even if you're correct you also have to be unambiguous, because if there's another interpretation of your words which is incorrect (or racist or whatever) people will often interpret you (or at least me :/) that way, and if they don't know you (and your tendency to be almost-but-not-quite always right :)) it's entirely reasonable for them to do so.
Of course unambiguous is not necessarily the same as nice.