From Steve Field, Ashford, Kent, UK
I have a theory that the oldest computer code is found in the program on which our simulated universe runs. Glitches caused by incompatible code lead to some unexplained events commented on in your pages. Minor glitches include mislaying 95 per cent of the universe and incompatibility of relativity and quantum physics. Major ones include the prevalence of odd socks. 8 March, p 34
