Comb spine and hollerith tabulator: what they have in common

  1. Step 1. Comb spine — is part of — Comb. The base that holds the teeth.
  2. Step 2. Comb — is made of — Bone. Ancient combs were carved from bone and antler.
  3. Step 3. Bone — is material for — Dice. Ancient dice were carved from animal bones.
  4. Step 4. Dice — evolved into — Probability theory. Problems about games of dice (Pascal, Fermat).
  5. Step 5. Probability theory — is used in — Statistics. Probabilistic foundations.
  6. Step 6. Statistics — uses — Hollerith tabulator. Processing censuses.

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