It’s kind of a mouthful, but the tenet basically says that when you write about punctuation or grammar, there’s a good chance you’ll make an error in your punctuation or grammar.
Most of us have been shamed for making writing mistakes. (Can we all just agree to stop calling each other out?) To ensure any grammar mistakes you make are simply typos and not signs you’re ignorant of the rules, take a look at this infographic from ShortStack. It lists 16 common word mix-ups that people commit.
Study this graphic to get a handle on i.e. vs. e.g., who vs. whom, and that vs. which.
Here are a couple of the tips you’ll find:
I.e. and e.g.
“I.e.” is an abbreviation for “id est,” which means “that is.” A good memory trick is to think of “in essence” when you see “i.e.”