Scientists battle in 'talking computer' competition
6 June 2014 Last updated at 20:35 BST
Scores of scientists are competing against each other in London to find out if any of them have created a talking computer.
The Turing Test will find out if anyone has created a computer which can mimic a human conversation and dupe a panel of judges.
BBC London's Gareth Furby spoke to Dr Ian Bland from Reading University, Red Dwarf actor Robert Llewellyn and Professor Kevin Warwick also from Reading University.