👉 The phrase "pluperfect" is a mathematical term used in set theory to denote a property that holds for all elements of a set. In this context, it refers to an element or subset of a set being "perfectly perfect," meaning that every element in the set has exactly one proper subset (a subset with fewer elements) and no other subsets.
For example, consider the set S = {1, 2, 3, ...} of natural numbers. The property "pl
pluperfect