SD-178
Oracle/Ground Contamination — new Lexicon term (v0.8). When the source of truth (L12) introduces an error that propagates through all verification layers because no layer has authority above L12. First observed: Captain’s off-by-one (12→13 layers) propagated through Secondary harness’s gated output. The classic human/computer off-by-1 index issue, propagated through a gated but ultimately probabilistic system. Counter-measure: a second L12 reading (the Two Ship experiment). Captain’s note: “No gate has authority above L12, and yet things can be executed under ‘my command’ (not actual) that blast 30% of the code base in a single commit.” File: docs/internal/human-hud-l12-fault.md. Lexicon: v0.8 (Error & Observation). Cross-reference: SD-176 (Secondary’s AnotherPair — the oracle contamination was observed in this exact interaction).
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