The two positions are therefore basically opposed to each other on all scores. The question is not simply as to which one is in accord with fact and logic. The question is rather in terms of which presupposition fact and logic have meaning at all. On which position is there any intelligible application of logic to fact at all? The question therefore concerns the philosophy of fact and the philosophy of logic. Any argument between them that does not go back to the question of presuppositions begs the question. The Christian position seeks to make human experience intelligible in terms of the presupposition of God; the non-Christian position seeks to make human experience intelligible in terms of man who is conceived of as ultimate.
– Cornelius Van Til, The Dilemma of Education p.30-31