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- ^ Exempli gratia (e.g.) and id est (i.e.) are commonly confused and misused in colloquial English. The former, exempli gratia, means "for example", and is used before giving examples of something ("I have lots of favorite colors, e.g., blue, green, and hot pink"). The latter, id est, means "that is", and is used before clarifying the meaning of something, when elaborating, specifying, or explaining rather than when giving examples ("I have lots of favorite colors, i.e., I can't decide on just one").
- ^ American style guides tend to recommend that "e.g." and "i.e." should generally be followed by a comma, just as "for example" and "that is" would be; UK style tends to omit the comma. See Dictionary.com and their discussion of commas for more information. Search "comma after i.e." for other opinions.
Technical style guides generally recommend the use of the phrase "for example" instead of e.g., and "that is," instead of i.e. The substitution of the English equivalent for the Latin is made in the interest of Clarity, one of the guiding principles of good technical writing.
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