onpon4 wrote: > "An" is only used when the following word begins with a vowel.
I think this needs clarification. "An" is used before vowel SOUNDS, not necessarily the letters themselves. The word "uniform" starts with a vowel, but we actually say "a uniform". See also: "It's a Unix system, I know this!" <https://www.youtube.com/watch?v=dFUlAQZB9Ng>.
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