| Unit set: The unit class in set theory is a class that contains exactly one element. In Quine's set theory, this is often referred to as a “spurious” class, as it cannot itself be an element of a set. This is an important point in Quine's set theory in order to avoid paradoxes such as Russell's paradox. See also Russell's paradox, Set theory, Sets._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. |
