There will, of course, still be criminals and criminal cases, even if the crimes will be different once the digital revolution is complete. Cyber-crime and sex crime is likely to be the most prevalent, but I doubt that even in 30 years’ time, society will accept the digital determination of guilt in contested criminal cases. Computers will probably not replace juries, even if the jury’s decision-making will be very greatly assisted by a range of digital processes. I heard the other day, however, that lie detection is a very inexact science. Apparently, it depends on how much the person taking the lie detection test is acclimatised to lying. Good liars pass such tests and bad liars fail.