"an artificial intelligence was used" this is weird phrasing? Why "an" is that normal?
Yes, it's typical syntax in the English language to separate vowels in that manner. English has lots of very little foibles like this (Y is sometimes a vowel) that you would be privy to unless you're a native speaker, so I can understand why you'd be confused, take a look here [0] for more info.
0: https://linguistics.stackexchange.com/questions/12798/why-is...