Title

Symmetry as a Criterion for Comprehension Motivating Quine’s ‘New Foundations’

Document Type

Article

Publication Date

3-1-2008

Abstract

A common objection to Quine's set theory "New Foundations" is that it is inadequately motivated because the restriction on comprehension which appears to avert paradox is a syntactical trick. We present a semantic criterion for determining whether a class is a set (a kind of symmetry) which motivates NF.