Claim
A Claim is a proposition attributable to an identifiable source.
Specification-sourced: quoted from the governing specification, pending the applicable specification-owner approvals. The specification controls.
In plain words
A buyer's statement that a grain lot was regeneratively produced is a Claim. It may be supported, challenged, disputed or superseded while remaining the proposition that was made, and it carries no built-in verified flag.
What it is not
Claim ≠ Observation
A Claim is a proposition attributed to a source; an Observation records what was perceived or measured, and neither substitutes for the other. Assertion · Canonical Model & Protocol (source: 04 §10.6)
Claim ≠ Evidence
A Claim is the proposition; Evidence is information that supports or challenges it and remains a distinct record with its own provenance. Evidence · Canonical Model & Protocol (source: 04 §10.3)