Pluto-as-Planet: Neil deGrasse Tyson Recants, sort of

Last night during the Q&A following astrophysicist Neil deGrasse Tyson's speech to The Commonwealth Club of California in our San Francisco headquarters, moderator (and "Eye on the Bay" host) Brian Hackney asked Tyson about a possible contradiction in Tyson's famous position on whether Pluto should be classified as a planet.
As usual, Tyson's answer reflects the quick humor -- and vast knowledge -- he brought to his speech and to dealing with the sold-out audience.