From John Widdowson, Melbourne, Australia
I was saddened to read that David E. H. Jones, better known on these pages as Daedalus, had passed away (Old Scientist, 2 September 2017). In the past, Daedalus was always my first port of call when reading New Scientist.
One story stuck with me. He described a supermarket where the price of articles changed as they were sold. If something was selling quickly the price went up, and went down if it wasn't moving. I seem to remember reading this when computerised supermarkets weren't common. A good bit of prediction.
