i.e./e.g.

People confuse “i.e.” and “e.g.” all the time, often not knowing that there’s a difference. Breaking it down Julius Caesar style, “i.e” is short for “id est” or roughly “that is”; “e.g.” is short for “exempli gratia” or “for example.”

So when you’re trying to be at your writerly best (i.e., showing off your grammarian know-how), make sure you don’t incur the wrath of those who know the difference (e.g., grammar nazis, disgruntled Latin teachers, or anyone going by the name of Brutus).