In this week’s installment of William Lane Craig’s book On Guard, he wraps up Chapter 3 by inadvertently exposing the fatal flaw in Leibniz’s Cosmological Argument. If you’re going to argue that some things exist “by a necessity of their own nature,” you need to make sure they really exist first. If that explanation can’t work for a universe that we all can see and examine and verify, it damn sure ain’t gonna fly for concepts of God that only exist in the minds and imaginations of fallible and self-deluding believers.