Ixiel comments on Open thread, Oct. 6 - Oct. 12, 2014

Ixiel 9 Oct 2014 22:45 UTC
4 points
See, I KNEW there was a literature ;)
- gjm 10 Oct 2014 0:56 UTC
  8 points
  Parent
  More seriously, John McCarthy.
  
  [EDITED to add:] Note the link at the end saying “solution” which has McCarthy’s own proposal.