What's the Difference Between i.e. & e.g.?

Mignon Fogarty is the founder of Quick and Dirty Tips and is known for her Grammar Girl websitepodcast, and games.

Misusing these two abbreviations is one of the top five mistakes I used to see when editing technical documents. There's so much confusion that in some of the drafts I got back from clients they had actually crossed out the right abbreviation and replaced it with the wrong one. 

What Do I.e. and E.g. Mean?

I.e. and e.g. are both abbreviations for Latin terms. I.e. stands for id est and means roughly "that is." E.g. stands for exempli gratia, which means “for example.” "Great. Latin," you're probably thinking. "How am I supposed to remember that?”

How to Remember the Difference Between I.e. and E.g.

But by now, I'm sure you know that I'm not going to ask you to remember Latin. I'm going to give you a memory trick. So here's how I remember the difference. Forget about i.e. standing for "that is" or whatever it really means in Latin. From now on, i.e., which starts with i, means “in other words,” and e.g., which starts with e, means “for example.” I = in other words. E= example.

A few listeners have also written in to say that they remember the difference between i.e. and e.g. by imagining that i.e. means “in essence,” and e.g. sounds like “egg sample,” and those are good memory tricks too.

So now that you have a few tricks for remembering what the abbreviations mean, let's think about how to use them in a sentence.

E.g. means “for example,” so you use it to introduce an example: I like card games, e.g., bridge and crazy eights. Because I used e.g., you know that I have provided a list of examples of card games that I like. It's not a finite list of all card games I like; it's just a few examples.

On the other hand, i.e. means “in other words,” so you use it to introduce a further clarification: I like to play cards, i.e., bridge and crazy eights. Because I used i.e., which introduces a clarification, you know that these are the only card games that I enjoy.

Here are two more examples:

Squiggly loves watching old cartoons (e.g., DuckTales and Tugboat Mickey). The words following e.g. are examples, so you know that these are just some of the old cartoons that Squiggly enjoys.

Squiggly loves watching Donald Duck's nephews (i.e., Huey, Dewey, and Louie). The words following i.e. provide clarification: they tell you the names of Donald Duck's three nephews.

An important point is that if I've failed, and you're still confused about when to use each abbreviation, you can always just write out the words "for example" or "in other words." There's no rule that says you have to use the abbreviations.

Dos and Don'ts

Don't italicize i.e. and e.g.; even though they are abbreviations for Latin words, they've been used for so long that they're considered a standard part of the English language. Also, remember that they are abbreviations, so there is always a period after each letter.

Also, I always put a comma after i.e. and e.g. I've noticed that my spell checker always freaks out and wants me to remove the comma, but five out of six style guides recommend the comma. Seriously. I got so engrossed in the question of whether a comma is required after i.e. and e.g. that I made a  table for the website summarizing the opinions of six different style guides.

Source Recommendation
Chicago Manual of Style A comma is usually used after i.e. and e.g.
Blue Book of Grammar and Punctuation Commas are preferable/optional after the abbreviations.
The Columbia Guide to Standard American English [Editors] require a comma after the second period [in these abbreviations].
The Guide to Grammar and Writing The comma [following i.e. and e.g.] makes good sense.
Lynch Guide to Grammar Both abbreviations should be followed by a comma.
Fowler's Modern English Usage Commas do not usually follow i.e. (No comment on e.g.

Nevertheless, even though I prefer the comma and have sources to back me up, they almost all use hedge words like “usually” and “preferred.” I've also been told that the commas are used less frequently in Britain, and the only style guide I found that advised against commas was Fowler's Modern English Usage, which has its roots in British English. The bottom line is that in American English, I recommend using a comma after i.e. and e.g. You could probably make an argument for leaving it out in some cases, but do so at your own risk. My personal rule is to use a comma every time.

Finally, I tend to reserve i.e. and e.g. to introduce parenthetical statements, but it's also perfectly fine to use i.e. and e.g. in other ways. You can put a comma before them, or if you use them to introduce a complete sentence that follows after another complete sentence, you can put a semicolon before them. You can even put an em dash before i.e. and e.g. if you are using them to introduce something dramatic. They're just abbreviations for words, so you can use them in any way you'd use the words in essence or for example.

This article was originally published by Mignon Fogarty on quickanddirtytips.com and shared here because we love her. She is also the author of the New York Times best-seller Grammar Girl's Quick and Dirty Tips for Better Writing.

Amazon's Under-the-Radar Coupon Page Features Deals on Home Goods, Electronics, and Groceries

Stock Catalog, Flickr // CC BY 2.0
Stock Catalog, Flickr // CC BY 2.0

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

Now that Prime Day is over, and with Black Friday and Cyber Monday still a few weeks away, online deals may seem harder to come by. And while it can be a hassle to scour the internet for promo codes, buy-one-get-one deals, and flash sales, Amazon actually has an extensive coupon page you might not know about that features deals to look through every day.

As pointed out by People, the coupon page breaks deals down by categories, like electronics, home & kitchen, and groceries (the coupons even work with SNAP benefits). Since most of the deals revolve around the essentials, it's easy to stock up on items like Cottonelle toilet paper, Tide Pods, Cascade dishwasher detergent, and a 50 pack of surgical masks whenever you're running low.

But the low prices don't just stop at necessities. If you’re looking for the best deal on headphones, all you have to do is go to the electronics coupon page and it will bring up a deal on these COWIN E7 PRO noise-canceling headphones, which are now $80, thanks to a $10 coupon you could have missed.

Alternatively, if you are looking for deals on specific brands, you can search for their coupons from the page. So if you've had your eye on the Homall S-Racer gaming chair, you’ll find there's currently a coupon that saves you 5 percent, thanks to a simple search.

To discover all the deals you have been missing out on, head over to the Amazon Coupons page.

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10 Words and Phrases That Came From TV Shows

Photo illustration by Mental Floss. Image: iStock.
Photo illustration by Mental Floss. Image: iStock.

Television can be a hotbed of creativity (or mediocrity, depending on who you ask). But it's not just characters and storylines writers are coming up with—they also coin words. Here are 10 surprising words that were invented thanks to TV.

1. Poindexter

While this term for a studious nerd might seem very 1980s, it actually comes from a cartoon character introduced on TV in 1959. In the series Felix the Cat, Poindexter is the feline’s bespectacled, genius nephew, supposedly named for Emmet Poindexter, the series creator’s lawyer.

2. Eye Candy

This phrase meaning a thing or person that offers visual appeal but not much substance originally referred to such a feature of a TV program. According to the Oxford English Dictionary (OED), it first appeared in 1978 issue of a Louisiana newspaper called The Hammond Daily Star: “Sex … is more blatant ... ‘Eye candy,' as one network executive calls it.” Ear candy is slightly earlier, from the title of a 1977 album by Helen Reddy, while arm candy is later, from 1992.

3. Ribbit

Think frogs have always been known to say “ribbit”? Think again: According to the OED, this onomatopoeia might have originated on a TV show in the late-1960s. While we can’t say for sure that absolutely no one was making this frog sound before then, the earliest recorded usage found so far (according to linguist Ben Zimmer) is from a 1965 episode of Gilligan’s Island, in which Mel Blanc voiced a character called Ribbit the Frog. This predates the OED’s earliest entry, which is from a 1968 episode of the Smother Brothers Comedy Hour: “That’s right. Ribit! .. I am a frog.”

4. Sorry About That

You've probably used this expression of regret more than once in your life, but did you know it was popularized by Get Smart? It's one of the many catchphrases from the late 1960s TV show. Others include “missed it by that much” and “the old (so-and-so) trick.”

5. Cromulent

Cromulent is a perfectly cromulent word, as far as the OED is concerned. This adjective invented on The Simpsons means “acceptable, adequate, satisfactory.” Other OED words the denizens of Springfield popularized are meh (perhaps influenced by the Yiddish “me,” meaning “be it as it may, so-so,” from 1928 or earlier), d’oh (the earliest recorded usage is from a 1945 British radio show), and embiggen, which first appeared in an 1884 publication by English publisher George Bell: “Are there not, however, barbarous verbs in all languages? … The people magnified them, to make great or embiggen, if we may invent an English parallel as ugly.”

6. Five-O

The OED’s earliest citation of this slang term for the police is from a 1983 article in The New York Times, although it was probably in use long before that. The moniker comes from Hawaii Five-O, which premiered in 1968. In the show, five-o refers to a particular police unit and apparently was named in honor of Hawaii being the 50th state.

7. Gomer

While the word gomer has been around since the year 1000 (referring to a Hebrew unit of measure), the sense of someone stupid or inept comes from the inept titular character in the 1960s show Gomer Pyle, U.S.M.C. It’s also a derogatory name among medical professionals for a difficult patient, especially an elderly one.

8. Cowabunga

Sure, the 1960s surfing slang might have regained popularity in the late ‘80s and early ‘90s due to the Teenage Mutant Ninja Turtles cartoon series, but it originated way before then. Chief Thunderthud, a character on the 1950s children’s show Howdy Doody would use it as faux Native American language. After that, it somehow made its way into surfer slang, hence becoming a catchphrase of Michelangelo, the hard-partying, surfing ninja turtle.

9. Har De Har

The next time you want to laugh in a sarcastic, old-timey way, thank Jackie Gleason for popularizing har de har via his iconic 1950s show, The Honeymooners.

10. Spam

So how in the world did spam, originally the name of a canned ham, come to mean junk email or to inundate with junk emails or postings? Chalk it up to Monty Python’s Flying Circus. The food Spam (which stands for either “spiced ham” or “shoulder of pork and ham”) was invented during the Great Depression in the late 1930s. Fast-forward 40-some-odd years and the British sketch comics were singing incessantly about it. This apparently was the inspiration for the computer slang that came about in the early 1990s.