Can I know anything for certain? Can I even be sure that I exist? Descartes pushed scepticism to its limits in his Meditations. Nigel Warburton explains Descartes' key ideas and some of the criticisms that can be levelled against them.
Soren Kierkegaard's Either/Or is an oblique but brilliant contribution to philosophy. In this episode of Philosophy: The Classics author Nigel Warburton summarises the book and considers several interpretations of it.