Abstract

Starting from a critical perspective, the present paper tries to detect points in which the speech commits excesses in an argument that pretends to demonstrate the existence of God. Excesses that without being looked at under the magnifying glass of a critique of reason, can go unnoticed. In this way, the Leibnizian notion of God will be addressed, and different arguments that try to demonstrate their existence will be covered, conceiving them under the guiding principle that they are the product of a speculative reason, which ignores the fundamental role of experience in knowledge. Leibniz's argument regarding the demonstration of the existence of God can be divided into five arguments: the ontological argument, the cosmological argument, the argument of eternal truths, the argument of pre-established harmony and the modal argument. We will confine ourselves to addressing the first two: the ontological argument and the cosmological argument. We have considered that the demonstrative errors of such arguments are given, in a general way, by the confusion that occurs between a demonstration of why something exists and an effective demonstration that something exists objectively.