As robots become more human-like, John McCarthy asks whether there is any aspect of humanity that could never be programmed into a machine.
Experts from the informatics department of King's College, London, reflect on the possibility of developing artificial emotions, morality and creativity. Will there come a time when it will be impossible to tell a machine from its maker?
The programme includes extracts from the first work of fiction about robots, by the Czech playwright Karel Capek, as well as more recent imaginings by Isaac Asimov.
William James, Andrew Marvell and Richard Dawkins muse on the nature of self, soul and culture.
We hear computer-generated music, as well as compositions by Stockhausen, Wasifuddin Dagar and Regina Spektor.
Readers: Michael Colgan and Sarah Lawrie.
Producer: Jo Fidgen.
A Whistledown production for BBC Radio 4.