Description: A dichotomy is any splitting of a whole into exactly two non-overlapping parts.
In other words, it is a partition of a whole (or a set) into two parts (subsets) that are:
mutually exclusive: nothing can belong simultaneously to both parts, and
jointly exhaustive: everything must belong to one part or the other.
The two parts thus formed are complements. In logic, the partitions are opposites if there exists a proposition such that it holds over one and not the other.
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