Expert system and needle: what they have in common

1. Step 1. Expert system — evolved into — Chess computer. Symbolic AI.
2. Step 2. Chess computer — uses — Chess. It plays chess.
3. Step 3. Chess — is a kind of — Board game. A board game.
4. Step 4. Board game — uses — Dice. Dice.
5. Step 5. Dice — is made of — Bone. Ancient dice were carved from animal bones.
6. Step 6. Bone — is material for — Needle. The first needles with an eye were carved from bone.

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