Here’s an attempt to explain Saint Anselm’s original argument that theologians love. Apparently Immanuel Kant pretty much destroyed it in its original formulation. But in this clip, theologians like Alvin Plantinga claim to have resurrected it in a better form that shifts the burden onto some thing that he refers to as a theorem in modal logic.
In this next clip Plantinga tries to explain what this ‘new’ modal argument is.
I must admit, I just don’t get it. As I have said many times, I simply do not see how you can answer an empirical question of the existence of anything using pure reasoning without any supporting data. Just because you can conceive of something or because something is possible to exist cannot lead to any firm empirical conclusions as to its existence.
Another philosopher Colin McGinn tries to explain to Jonathan Miller what the ontological argument is and the problems with it. This part begins at around the 11:30 mark and continues for the first 30 seconds of the second part.
If this is the best argument that theologians can come up with, then god is done for.