From Andy Biddulph
This letter is a test of quantum time travel (20 November, p 34). I, in your past, am sending you, in my future, a message. When you print this, in my future, you will, by post-selection, be sending me, in your past, a message telling me what to type when I have finished my cup of coffee. PS: It works.
Burton on Trent, Staffordshire, UK
