The Transcendental Argument for the Existence of God (TAG) is the argument that attempts to prove the existence of God by arguing that logic, morals, and science ultimately presuppose a supreme being and that God must therefore be the source of logic and morals. A version was formulated by Immanuel Kant in his 1763 work The Only Possible Argument in Support of a Demonstration of the Existence of God, and most contemporary formulations of the transcendental argument have been developed within the framework of Christian presuppositional apologetics. Transcendental reasoning Transcendental arguments should not be confused with arguments for the existence of something transcendent. In other words, they are distinct from both arguments that appeal to a transcendent intuition or sense as evidence, and classical apologetics arguments that move from direct evidence to the existence of a transcendent thing. They are also sometimes said to be distinct from standard deductive and inductive forms of reasoning, although this has been disputed, for instance by Anthony Genova and Graham Bird. Ash'ari Medieval Ash'ari Islamic theologians formulated a type of transcendental argument based on the notion that morality, logic, etc. cannot be fully understood apart from revelation and thereby, belief in the Quran and the Islamic truth claims were necessary in order to interpret the external world. For al-Ashari and others, it does not make sense to argue against religion using a priori assumptions about morality or scientific probabilities when these can only be understood in light of divine revelation. The argument The TAG is a transcendental argument that attempts to prove that God is the precondition for logic, reason, or morality. The argument proceeds as follows: God is a necessary precondition for logic and morality (because these are immaterial, yet real universals). People depend upon logic and morality, showing that they depend upon the universal, immaterial, and abstract realities which could not exist in a materialist universe but presupposes (presumes) the existence of an immaterial and absolute God. Therefore, God exists. If He didn't, we could not rely upon logic, reason, morality, and other absolute universals (which are required and assumed to live in this universe, let alone to debate), and could not exist in a materialist universe where there are no absolute standards or an absolute Lawgiver. Cornelius Van Til likewise wrote: Therefore, the TAG differs from thomistic and evidentialist arguments, which posit the existence of God in order to avoid an