I spend a lot of time thinking about how life works and how to word things so as to crystallize the essence into something comprehensible. It's a bit of a hobby of mine. But recently I've realized all over again that one of the reasons I ruminate in this way is because I'm essentially rehearsing for the imaginary moment I'll need to explain and defend common sense to certain folks in my life who either don't get it or want to twist it so that they can justify their actions.
Thankfully, every now and then I come to a deeper realization of what a true waste of mental energy that is. The people who get it don't need an explanation, and the rest won't learn from one... and probably don't even want to.
Unfortunately, some people want to be able to do whatever they want, and throwing you off balance by putting you on the defensive is a great way to manipulate you into getting out of their way. So why oblige them? Save your mental energy and words for the people who are truly there with you.