Writing and shaduf: what they have in common

1. Step 1. Writing — uses — Ink. People wrote with ink on papyrus, parchment and paper.
2. Step 2. Ink — is used in — Gutenberg printing press. An impression needs ink; Gutenberg used an oil-based one.
3. Step 3. Gutenberg printing press — works like — Cylinder seal. An analogy: both a seal and a press reproduce a pre-carved pattern.
4. Step 4. Cylinder seal — is made of — Stone. Seals were carved from stone.
5. Step 5. Stone — is material for — Well. The walls of wells were lined with stone.
6. Step 6. Well — uses — Shaduf. Or with a well sweep.

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