You’ve written a compelling article that shows you know your stuff. You decide to include an example for clarification so you toss in an i.e. But wait! Inaccuracy in the use of i.e. or e.g. can demolish your intended meaning and your professionalism…so be sure to know which form is required.

E.g. is short for a Latin term, exempli gratia, that means “for example.” (Karen and John had much in common, e.g., their work in the lab and their love of Cocker Spaniels.)

I.e. is a more specific term, short for the Latin id est, meaning “that is.” (Karen and John had one difference, i.e., their plans for a future together.)

Both e.g. and i.e. must have commas before and after, unless they’re preceded by a dash or parenthesis.