Boolean algebra and lathe: what they have in common

1. Step 1. Boolean algebra — is used in — Logic gate. A gate is a Boolean function.
2. Step 2. Logic gate — is part of — Flip-flop. A flip-flop is made of gates.
3. Step 3. Flip-flop — has part — Vacuum tube. The first flip-flop used vacuum tubes.
4. Step 4. Vacuum tube — is made of — Tungsten. The cathode is a tungsten filament.
5. Step 5. Tungsten — is material for — High-speed steel. Tungsten.
6. Step 6. High-speed steel — is used in — Lathe. Cutting tools.

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