{"id": "card_n_dcb1a67c26e8", "kind": "note", "title": "The evolution of language — descent traced by regular law", "body": "Languages descend like living lineages, and the descent is RECOVERABLE — the comparative\nmethod is one of the humanities' deterministic sciences. English 'father' descends from\nProto-Indo-European *ph2ter, cousin to Latin pater, Sanskrit pitr, Greek pater; the path is\ntraceable by rule. Sealed structure (https://narrowhighway.com/s/9c66f521565216319b7ab6cf3bca9314c18dfe3e9982b88459f714c61237c10f): a family tree is a phylogeny — 5 languages\nadmit 105 possible rooted trees, 10 admit 34,459,425 (the double-factorial (2n-3)!!, the SAME\nformula biology uses for gene trees) — and core vocabulary decays EXPONENTIALLY, ~86% retained\nper millennium, a ~4,595-year half-life; the linear-decay misconception sealed BROKEN (https://narrowhighway.com/s/e456b15c210b9675bfdb7813c725256cd2c52b267665b9cc4518a826c6019545).\n\nHonest boundary, three colors: the sound-law REGULARITY is a strong empirical finding (Grimm,\n1822); Proto-Indo-European itself is RECONSTRUCTED — every form marked with * to say inferred,\nnot attested (a hypothesis, not a sealed fact); its DATE is genuinely CONTESTED (Steppe ~6,000\nvs Anatolian ~9,000 years) — INCOMPLETE; and glottochronology's constant rate is HEURISTIC — a\ntrend, not a law. Language evolves like life, and we read its fossils in the sounds.", "source": {"label": "Concordance assay — 2026-07-09", "url": "https://narrowhighway.com/s/9c66f521565216319b7ab6cf3bca9314c18dfe3e9982b88459f714c61237c10f", "ref": "language", "authority_tier": "engine_derived"}, "shelf": "science", "box": "language", "bands": ["language evolution", "comparative method", "proto-indo-european", "historical linguistics", "grimm's law", "phylogenetics", "glottochronology", "capstone"], "connections": [], "author": "engine", "created_at": "2026-07-10T02:06:03.344343+00:00", "updated_at": "2026-07-10T02:06:03.344343+00:00", "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "metrics": {"paperclips_count": 0, "helpful_count": 0, "not_helpful_count": 0, "cite_count": 0, "walks_through_count": 0, "flagged_count": 0}, "source_hash": "6071951d69ad5b4252ef273a87873973a14c325723ee5b88c34ede035667f2ba"}