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John likes fast cars, where neither John nor fast cars includes a determiner.

The definite article the is the default when the referent of the noun phrase headed by a common noun is assumed to be unique or known from the context. For example, In the sentence The boy with glasses was looking at the moon, it is assumed that in the context the reference can only be to one boy and one moon. However, the definite article is not typically used:
*with generic nouns (plural or uncountable):

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