Watch video Barber & Russell Paradoxes (History of Undecidability Part 2) - Computerphile online without registration, duration 10 minute 40 second in high hd quality. This video was added by user Computerphile 30 September 2014, don't forget to share it with your friends and acquaintances, it has been viewed on our site 143 thousand once and liked it 3 thousand people.