Twistor Encodings as High-Coherence Limits of Modal Triplet Theory

Twistor methods encode important four-dimensional massless, conformal, and self-dual field sectors in holomorphic geometry. This paper asks a narrower MTT question: when may an already selected coherent sector be represented by such twistor data? The answer requires two logically independent bridges. First, controlled projection must reduce upper dynamics to a four-dimensional sector with an explicit error estimate. Second, that sector must carry the conformal spin geometry, integrable twistor distribution, reality structure, and field equations required by the Penrose or Penrose–Ward correspondence. A spectral gap can support the first bridge but cannot create the second. We prove this separation by a finite-dimensional counterexample, derive the exact memory equation for projected dynamics, and show that loss of a gap or error bound does not imply stochastic, set-valued, or kernel-valued evolution. We then state a conditional twistor-descent theorem: if one selected MTT source supplies the projection, four-dimensional conformal-spin carrier, self-dual field sector, twistor double fibration, reconstruction map, and commuting dynamics, the standard twistor correspondence becomes a valid encoding of that MTT sector. Approximate use additionally requires stability estimates for both truncation and holomorphic or self-duality defects. This revision preserves the high-coherence twistor corner as a useful conditional encoding, while withdrawing claims that twistor geometry, optimality, selection events, irreversibility, or arbitrary MTT dynamics follow from spectral suppression alone.