To Have a Body Is to Have One's Own Clock: To the Master of Thirty-Seven Trillion Cells (The Kuriyama Protocol, Final Chapter)

Part 18 of a series; the thirteenth of fifteen chapter-by-chapter articles. Part 1: 10.5281/zenodo.23587879 · Part 2: 10.5281/zenodo.23587670 · Part 3 (v2): 10.5281/zenodo.23723510 · Part 4: 10.5281/zenodo.23609857 · Part 5: 10.5281/zenodo.23610607 · Part 6: 10.5281/zenodo.23682055 · Part 7: 10.5281/zenodo.23684537 · Part 8: 10.5281/zenodo.23684996 · Part 9: 10.5281/zenodo.23685960 · Part 10: 10.5281/zenodo.23686289 · Part 11: 10.5281/zenodo.23720048 · Part 12: 10.5281/zenodo.23723725 · Part 13: 10.5281/zenodo.23834848 · Part 14: 10.5281/zenodo.23854475 · Part 15 (v2): 10.5281/zenodo.23886603 · Part 16: 10.5281/zenodo.23859894 · Part 17: 10.5281/zenodo.23874674 The final chapter of The Kuriyama Protocol answers the book's opening question (why gait did not change after structural repair: the control law lives elsewhere and updates under other conditions) and states what this offers robotics and reinforcement learning. Measurable, trainable quantities (relative strength) dominate training while phase matching is neglected. Repetition counts favour structure over will, so the structure, environment and conditions must be changed. Forced resets come from environments where old solutions fail, provided a sense of safety keeps the gate open. Readers receive criteria for choosing methods rather than a method. Five gaps found while writing: - The book's closing claim, "phase cannot be given from outside", contradicted its own evidence: walking cost becomes uniform when measured in each person's body units (Weyand et al., 2010). The optimal phase is common in dimensionless form; what cannot be prescribed uniformly is its conversion to seconds or hertz, because each body's clock (including musculotendinous spring stiffness) is invisible from outside. Restated: to have a body is to have one's own clock. For robots: express control targets in dimensionless units of the machine's own clock, estimated from its behaviour, with gravity as a clock-setting constant (cf. De Witt et al., 2014). - Cadence is readily instructed by metronome (Thaut et al., 1996); the difficulty is knowing the individual target. - "No additional command" for foot stiffening overreached: intrinsic foot muscles stiffen the forefoot and toes for push-off (Farris et al., 2019). - Two corrections from Part 16 had not propagated (the gate defined as conscious detection; "structure always wins; it is physics"); restated as "the side that wins in the most frequent contexts wins overall". - The method-selection criteria omitted whether failure conditions are stated and whether evidence survives aggregation; six criteria now. Five falsifiable predictions are registered (numbered 82–86, continuing the series; 86 in total): - P82. A common absolute cadence raises energy cost in proportion to each person's deviation from preferred cadence; a common multiple of preferred cadence raises cost similarly regardless of stature. - P83. With a metronome and no body-related instruction, cadence converges to within 3% of the beat within about ten steps. - P84. Fatiguing intrinsic foot muscles increases midfoot bending and reduces propulsion at push-off, with little change in arch compression at landing. - P85. Next-day retention of uneven-terrain practice is greatest at intermediate difficulty. - P86. Repetitions embedded in frequent daily contexts transfer more to everyday gait than the same repetitions massed at a fixed time. Refutations are welcome. The author has no formal research training. Corrections will be issued as new versions, with earlier versions kept retrievable. The article body is in Japanese. An English summary, the registered predictions and the reference list are included in the document. Contact: [email protected]