Freewill argument

Chrisitianity holds that God (a) has free will and (b) is omniscient. For God to have free will, he must be able to choose at any moment in time ("the present") between two options. For God to be omniscient, he must know everything, both in the present and in the future. It follows that at any moment in time ("the present"), when faced with several options, he will know which one he will pick. Thus, since God has no choice in his descisions, he cannot both have free will and be omniscient, which proves that the Chrisitian ideal of God cannot exist.

See atheism, Arguments against the existence of God, secularism, rationalism, the rationality of atheism, agnosticism.