Evidence

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verify/: Independent mathematical review and distinct grading of the selected source proof.

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The source proof is recorded at the translated-interval theorem. The retained independent review and distinct grade cover the whole argument.

This noncomputational argument needs no executable certificate. The retained record gives the exact native subject and source artifacts, independent derivations, source-reading scope, and limitations. The distinct published Kesten length criterion has statement and elementary-transfer checking only; its necessity proof remains outside this evidence's scope.