This is kind of a classic Chesterton retort and it can go a couple of ways… 1.) The amazing analysis to systematically prove God's Non-Existence must have come from some miraculous capacity to think powerful thoughts. So where does Mr. Atheist explain where his/her probing reason come from? ? A meteor shower that went awry?? 2. A rather odd endeavor… to invest energy into proving that something doesn't exist. Why not pick something more interesting to PROVE IS NON-EXISTENT like: Elvis is alive and well in Sedona, AZ or Lord Voldemort is working (or not working) at the Wal-Mart in Santa Clara, CA.