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How could SI units be derived from scratch without the use of modern technology?
  • SI is great, but if you reset everything (and lose all tech and most of knowledge), just create a new system. Embrace what makes SI great (easy conversions and a the nature-based properties) and do it over.

    For length, use Hydrogen line when you advance your society enough. It's more universal than using 🌎 as a 📏.

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