ABSTRACT
In the last two chapters we examined cosmological and teleological arguments, both of which focused on some feature of the universe and concluded either that God must be posited to account for it (cosmological argument) or that it pointed to a designer of the universe (teleological argument). These arguments are a posteriori, for they are based on premises that can be known only by experience of the world. Another kind of argument attempts to demonstrate that God’s non-existence is impossible – this is the ontological argument. It is unique among the traditional arguments for God’s existence in that it is an a priori argument, for it is based on premises that can allegedly be known independently of experience of the world.
