Mark Oppenheimer and Jason Werbeloff of the Brain in a Vat podcast join Bill and Mark L. (aka Alf) to talk about rationality, broadly construed, while not moving a couch and not giving each other Christmas presents. Does "reason" by itself tell us what to do and what to believe? Is trypophobia really just bigotry? (It is not.) What's the rationale for making negative comments on a podcast? Are bigots bigger than bigamists? Was Ayn Rand a cannibal? Mark philosophizes at partiallyexaminedlife.com. Bill improvises (and teaches) at chicagoimprovstudio.com. Hear more at philosophyimprov.com. Support the podcast to get all our post-game discussions, video versions of recent episodes, and other bonus stuff. Sponsor: Check out the Banned Camp comedy podcast.