Episode details

Available for over a year
When is a heap of sand not a heap? And when does a man go bald? Edmund Butler examines the chains of logic.
Programme WebsiteUse BBC.com or the new BBC App to listen to BBC podcasts, Radio 4 and the World Service outside the UK.

Available for over a year
When is a heap of sand not a heap? And when does a man go bald? Edmund Butler examines the chains of logic.
Programme Website