# Why moral properties covary with but never reduce to natural facts **Artwork**: **Artist**: Arnaud Quercy **Asset**: IDS-RNI0150 **Serial**: NAN-RDG000094 This SEP entry is a technical analytic-philosophy survey of ethical supervenience — modal covariance between classes of properties, grounding, realism/anti-realism, conceptual vs. metaphysical necessity — and contains no artist, receiver, sense, wave, gesture, or codex for the ideamorphism framework to test itself against; any apparent overlap (its use of 'invariant', 'structure', 'necessary connection') is a coincidence of vocabulary between two unrelated technical uses, not a point of contact the lens can honestly probe. ## Context ### Declined — `no-purchase` [@source] ### Propositional grid [@p31] > **Read this grid.** “Not evaluated” does **not** mean the source has nothing to say about that proposition. It means **the reading did not instruct it**. That is not a result, and it counts in no denominator. A silence, by contrast, is a finding: the reading touched the proposition without concluding, or noted its absence itself. **Not evaluated (37)** — P1, P2, P3, P3a, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13, P14, P14a, P14b, P15, P16, P16a, P17, P18, P18a, P19, P19a, P20, P21, P22, P23, P24, P25, P26, P27, P28, P29, P30, P31 --- *Overall verdict: **DECLINED:no-purchase** — taxonomy of the August 2026 pass, predating the move to relational verdicts. Kept as metadata: the gap between the two forms is data, not residue. This reading’s judgement is in the grid above.* Reading of 2026-07-02 · model `claude-sonnet-5` · source 126,305 chars · 1 attempt(s) --- ### First pass — kept as written *Reading produced by the T50 RSS pass, before the boundary lens. It is reproduced UNCORRECTED. Keeping it is the point: without it, a changed title is just a changed title — with it, what the second pass refused becomes legible.* > Supervenience — the principle that ethical facts cannot change without physical facts changing — is a formal constraint system. It describes a CODEX at the level of moral ontology: ethical properties are bound by rules of dependency on lower-level properties. The entry's exploration of 'merely possible circumstances' (counterfactuals) reveals the ricochet effect: once you specify the physical invariant, the ethical invariant becomes determinate, yet this determination itself generates new questions about freedom, responsibility, and moral agency. The constraint doesn't close the system — it opens new diffractive possibilities. This is engineering diffraction through formal constraint. T50 RSS assessment · 2026-07-02 · remplacée par `boundary-lens-2026-08`