The process or act of dividing something into two distinct, opposite parts or categories.
From 'dichotomize' plus the suffix '-ation' (the act or process of). This noun form emphasizes the action or result of creating a dichotomy, the ultimate systematization of binary thinking.
The dichotomization of gender into purely 'male' and 'female' worked for biology textbooks, but modern science reveals this is way too simple—nature is far messier and more nuanced than any binary.
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