Executive synthesis: choose functions, not famous voices

The first comparative pilot finds no defensible “best writer.” The useful unit is a bounded communication function under explicit conditions.

Darwin helps when an audience must make an unseen mechanism plausible through familiar analogies, varied cases, and answered objections. Euclid helps when a derivation must be auditable from shared premises. Brown helps an authorized institution narrow a question, acknowledge limits, connect governing warrant to present effects, and close with a usable rule. Descartes helps motivate a method by first making the problem experiential. RFC 9110 helps experts coordinate through stable terminology, normative distinctions, and a navigable reference graph.

The shared pattern is not sentence style. Each text manages prerequisites, orders dependencies, supplies a genre-valid warrant, and closes according to its use. The important differences follow proof burden, audience resistance, authority, and use mode. Those variables should be declared before selecting techniques.

Three guardrails matter most:

1. Analogy, fluency, authority, and memorability are not evidence.
2. Combining strong techniques is useful only when their audience roles and proof obligations are compatible.
3. High-stakes medical, safety, legal, organizational, and interpersonal communication requires domain protocols, accessibility, uncertainty, and audience welfare to constrain any writer-derived model.

The result supports TH-COMM-2026-0001 at Medium confidence but remains a desk study. The next discriminating step is a preregistered comparison of two architectures on one explanation task, measuring comprehension, transfer, calibrated confidence, and subgroup accessibility—not liking or readability alone.