Miguel Pérez de Laborda, Full Professor of Metaphysics of the School of Philosophy of the Pontifical University of the Holy Cross. Pontifical University of the Holy Cross (Rome), explained the reasons that try to justify that God does not exist. Atheism bases its denial of God on various types of arguments. Normally they are a posteriori arguments, in which the aim is to prove that the existence of God is incompatible with some known phenomenon: evil or human freedom, for example.

At other times, the strategy is indirect: it seeks to "unmask" the origin of the idea of God; that is, to discover why man "created God". But these "reasons" often conceal less rational "motives": a claim to freedom that is thought to be achieved by declaring God non-existent, thus freeing oneself from his "dominion".

"If God created us free, it is because God wanted us to be free. Would it be better to live in a "Truman show," Professor Pérez de Laborda asked. Virtues such as fortitude or solidarity would not be possible," he said.

"There are those who have wanted to eliminate God because if evil exists, God cannot exist. But by denying the existence of God they have fallen into a kind of relativism that denies the distinction between good and evil. If evil exists, God exists, because good cannot exist if God does not exist," the professor continued.

Miguel Pérez de Laborda concluded that the burden of the test is on the believers; "we are the ones who have to prove that God exists. If no one convinces them otherwise, in the end everyone is left with their starting position".