An individual with borderline personality disorder who sees other people as either idealized friends who are perfect or as hated enemies who are completely despicable has a thinking style called

Such an individual has a thinking style called "Splitting thinking style".

Explanation:

Splitting thinking style is a defense mechanism in people diagnosed with borderline personality disorder. It is also called "black or white thinking".

Individuals that exhibit this style of thinking tend to view themselves and others in extreme terms, as either bad or good, because they focus only on negative or positive characteristics in people.

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