3 ms·

I've never heard of this before. This is wild. More here: https://www.historyofinformation.com/detail.php?id=3351 https://www.historyofinformation.com/detail.

• quuxplusone 2mo ago
  And that book is (naturally enough) borrowable on archive.org. :) https://archive.org/details/policemansbeardi0000unse/page/n21 https://archive.org/details/policemansbeardi0000unse/page/n2...
• buescher 2mo ago
  I first learned of it in Douglas Hofstadter’s Metamagical Themas, I think. You can run it here: https://archive.org/details/msdos_Racter_1984 https://archive.org/details/msdos_Racter_1984