Dichotomy
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A dichotomy is a partition of a whole (or a set) into two parts (subsets) that are:
- jointly exhaustive: everything must belong to one part or the other, and
- mutually exclusive: nothing can belong simultaneously to both parts.
Such a partition is also frequently called a bipartition.
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Etymology
The term dichotomy is from the Greek language διχοτομία dichotomía "dividing in two" from δίχα dícha "in two, asunder" and τομή tomḗ "a cutting, incision".
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See also
- Binary opposition
- Dichotomy paradox
- Dilemma
- Dualism
- Law of excluded middle, which in logic asserts the existence of a dichotomy
- Opposite
- Taxonomy
- Trichotomy
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