How a knowledge claim was established: MEASURED_RESULT (quantified data), OBSERVED_REPEATEDLY (seen multiple times), OBSERVED_ONCE (seen once), HUMAN_DEFINED_RULE (declared, not derived), INFERENCE (reasoned from other claims), or SPECULATION (untested guess).
Evidence type tells you how seriously to take a claim. A MEASURED_RESULT outranks INFERENCE every time.
OTP encodes coordination intelligence so teams of humans and AI agents can run on it.
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