In plain terms: vocabulary entry noting that Robin Hanson's Great Filter Hypothesis (1996) shares 'civilizational-failure' grammar with the engine's structural-pressure windows (2032 magnitude 2.078, 2027 1.871, 2030 1.802, May 14-22 2040 Phoenix transit) and with Club of Rome BAU2 collapse-window mathematics. The vocabulary-overlap is descriptive analogy, NOT engine-prediction-merger. The engine's pressure windows remain measurements of terrestrial structural pressure as currently engine-defined. The concept exists so cross-references can be made without each instance re-stating the no-merger caveat. The Apr 25 adversarial-test adjudication denied promotion of this overlap to Layer-1 framework status. Layer-4 vocabulary noting that the Great Filter Hypothesis (Hanson 1996, 1998 with Sandberg + Bostrom) shares 'civilizational-failure' grammar with the engine's structural-pressure windows (2032 magnitude 2.078, 2027 1.871, 2030 1.802, May 14-22 2040 Phoenix transit) and with Club of Rome BAU2 collapse-window mathematics. The vocabulary-overlap is DESCRIPTIVE ANALOGY, NOT engine-prediction-merger. The engine's pressure windows remain measurements of terrestrial structural pressure as currently engine-defined. Whether Great Filter language should re-frame those windows is a Layer-1 promotion question pending adversarial-test adjudication. The concept exists as engine vocabulary so cross-references can be made without each instance re-stating the no-prediction-merger caveat. [Apr 25 2026 ADJUDICATION-CONFIRMED] PROMPT_COSMOLOGICAL_APEX_PROMOTION_TEST.md returned: Great-Filter-Window engine-prediction-integration claim DENIED across all 7 tests. Methodology comparison proved engine's 138-year cyclical sociological metronome (the 138-year reset cycle 201,614-date dataset) shares ZERO mathematical overlap with Hanson's deep-time power-law probability distributions covering 13.8 billion years. The overlap is entirely semantic (shared 'civilizational failure' grammar). Merging the prediction-architectures would destroy the engine's strict 2032/2040 falsification protocols by diluting them with unfalsifiable cosmological timelines. Concept stays Layer-4 descriptive vocabulary. Do not regress.