Criteria vs. Criterion: Decoding the Difference - Elite Editing
https://eliteediting.com/resources/grammar/criteria-vs-criterion-decoding-the-difference/
WEBCriterion is just the singular form. In other words, “criterion” refers to a single thing, while “criteria” refers to two or more things. That’s it! To say it another way, the only criterion for proper use of the word “criteria” is that you are listing several items. Get it? If not, read on for some illuminating examples.
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