Presuppositionalism is a school of Christian apologetics that believes the Christian faith is the only basis for rational thought. It presupposes that the Bible is divine revelation and attempts to expose flaws in other worldviews. Presuppositionalists compare their presupposition against other ultimate standards such as reason, empirical experience, and subjective feeling, claiming presupposition in this context is: Critics of presuppositional apologetics claim that it is logically invalid because it begs the question of the truth of Christianity and the non-truth of other worldviews.