Dichotomy | Philosophy, Paradox, Contradiction | Britannica
https://www.britannica.com/science/dichotomy
WEBdichotomy, (from Greek dicha, “apart,” and tomos, “cutting”), a form of logical division consisting of the separation of a class into two subclasses, one of which has and the other has not a certain quality or attribute. Men thus may be divided into professional men and men who are not professionals; each of these may be subdivided ...
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