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My dad is (a) racist.
In this sentence, is 'racist' used as a noun or an adjective? If it is used as an adjective, then is this sentence correct without the article?
Using a definite ("my dad is the family racist") or indefinite ("my dad is a racist") article makes "racist" a noun. Otherwise the syntax makes it an adjective.
Not many words are that mutable.
Required, but never shown