this is a good example of Artificial Intelligence. Stephen
  Hawking was likely a little spooked at the progress made when
  they fitted him with this new predictive system a couple of
  years ago. It was vastly superior to the stuff he used before,
  which was circa late 1980s/early 1990s. I could be wrong, but I
  think having a system that really *did* seem to know what he was
  thinking might have been a tad spooky and started the chain of
  events.