Which is NOT a determiner?

The correct response highlights that "predetermined" does not function as a determiner. Determiners are words that introduce nouns and provide context about quantity, specificity, or definiteness. Common examples of determiners include "this," "a," and "the," which are essential for indicating which noun is being referenced.

"Predetermined," on the other hand, is an adjective that describes something that has already been decided or established beforehand. It does not serve to clarify or quantify a noun directly, thereby excluding it from the category of determiners. Understanding the role of words in sentences helps distinguish between different parts of speech and their grammatical functions.