Why does the MMPI include some items that very few people check true, such as "I have never been angry"?

Name: Why does the MMPI include some items that very few people check true, such as "I have never been angry"?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The MMPI includes "fake" items, such as "I have never been angry," to assess whether the test-taker is honest about their responses or if they are trying to manipulate their answers in a socially desirable way. These items help identify whether someone is lying on the test.

Why Does the MMPI Include Some Items That Very Few