As part of Tuesday's episode of "Piers Morgan Tonight," magician and comedian Penn Jillette debated Morgan on the merits of atheism and religious belief. Jillette also contributed an essay on the topic to CNN.com in conjunction with the release of his new book, "God, No! Signs You May Already Be an Atheist and Other Magical Tales." The full interview airs tonight (8/16) at 9 p.m. EST on CNN.
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