Why is "doesn't" a legitimate starting word for a sentence?

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Chapters
00:00 Why Is &Quot;Doesn'T&Quot; A Legitimate Starting Word For A Sentence?
00:24 Accepted Answer Score 31
00:56 Answer 2 Score 10
01:20 Answer 3 Score 0
01:38 Thank you

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Tags
#wordusage #sentencestarts

#avk47