Many atheist thinkers argue that Christian claims are necessarily meaningless because they are "unfalsifiable." Since there is no way to prove Christian claims wrong, they argue, such claims are irrational. This episode looks at falsifiability, the difference between scientific and historical claims, and the sort of reasons we have for religious belief.

Atheists often try to explain the existence of morality within a godless world by appealing to evolution. This episode asks whether morality could have evolved and introduces the "imaginary world" tactic to show that evolved morality is not really morality at all.

An atheist's question, "What makes something moral or immoral?" generates a discussion about right and wrong, the difference between preferences and obligations, and whether morality could be meaningful in a godless world.

An article arguing that Caitlyn Jenner exemplifies a new form of "Americanized Christianity" prompts a discussion about what Christianity actually is. Is it the set of beliefs held by self-identified Christians, or is it something more objective: the way set out by Jesus for coming to our Heavenly Father?