Wikipedia and electric generator: what they have in common

1. Step 1. Wikipedia — evolved from — Encyclopedia. A free encyclopedia.
2. Step 2. Encyclopedia — uses — Gutenberg printing press. The Encyclopédie was a printed publication.
3. Step 3. Gutenberg printing press — uses — Ink. An impression needs ink; Gutenberg used an oil-based one.
4. Step 4. Ink — is used in — Ballpoint pen. Thick oil-based ink.
5. Step 5. Ballpoint pen — has part — Ball bearing. A ball in a socket — essentially a ball bearing.
6. Step 6. Ball bearing — is part of — Electric generator. Shaft bearings.

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