Excellent article, but the typesetting / justification in that pdf is horrendous.

The text columns look like the side of that hallway rubber mat that my dog keeps chewing on.

  spend a lot of time trying
  edge. However, as someone
  lieve that true progress is
  mes, and for the chickens
  y zombies, and the polite
  to eat your brain to acquire
  be prepared; thus, in the
  e scientific breakthroughs,
  ast inevitably becomes
  he main thing that I ponder is
  post-apocalyptic survival
  ag-tag group of associates.
  cruit: a locksmith (to open
  ith has run out of ideas);
  row snakes at my enemies
  g is a reasonable way to
  ble in my ultimate success