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Canonical Source · standard
This page documents how this source is reused across Claim by Claim. A source can support, challenge, qualify or contextualize different claims; appearing here does not imply endorsement of every linked proposition.
Evidence context
Evidence roles describe what this source helps establish inside each Investigation. They are local to that use, not permanent labels attached to the publication itself.
Investigation
The exact digit string 299,792,458 is specific to the modern SI representation of the speed of light in metres per second, with the metre defined using the fixed numerical value of c.
Subject families