No less a mind than Bertrand Russell, of Principia Mathematica fame, was responsible for this paradox, which opened a hole in math. It's those barbers. The Barber Paradox shows that barbers are not to be trusted.
As philosophical debates go, it doesn't get much better than this. On January 28, 1948, British logician Betrand Russel faced off against Jesuit priest F.C. Copleston on BBC radio in a now-famous debate over the existence of god, and the metaphysical and moral implications of a god-governed (or godless) universe.…
How's your Monday coming along? Pretty rough? Well it's about to get a little hairier. If I'm not mistaken, this self-referential brain teaser is a play on the age-old Liar's paradox, (or, for those of you familiar with set theory, Russell's paradox), reframed in the form of a multiple-choice question.
The next Symphony of Science jam session is out titled, "A Wave of Reason." Listen to Bertrand Russell, Carl Sagan, Carolyn Porco and others sing about "scientific reasoning and skepticism in the face of growing amounts of pseudoscientific pursuits."