ordinary triumphs, part II

for years (maybe) I have been concerned about "each other" vs. "one another." I heard someone once say that there was a grammatical issue therein and I was sure, on my grammar high horse, that I was doing it wrong. I thought I'd done the research and it was complicated, but even so, this one's been bothering me lately and I figured I'd better try again. We ease the anxiety where we can, no? so i checked it out. and it's the easiest ever!

• Use "each other" with two people.
  
  
• Use "one another" with more than two people.

Um, yeah. I think I can remember that.