Honest Treatment Limits: Where the Kernel Has No Restoration Knob (Results, Not Failures)

Three disease classes have no kernel restoration, and saying so is the result: developmental dosage dysplasias (the master-switch window has closed), osteoarthritis cartilage regeneration (no resynthesis term), and established-tumour cytotoxic therapy (the kernel models initiation, not cell-killing). Primary cancer prevention — remove the carcinogen — is verified [V]; general metabolic myopathy is open [O].

The framework is most useful where it declines to over-claim. Developmental dosage cliffs are not postnatally reversible because the master-switch crossing is a closed-window decision and the formed skeleton is fixed; cartilage does not regenerate; and chemotherapy kills transformed cells, which is not a barrier-restoration of the original switch. Primary prevention (dose down → risk down) is in scope and verified; only a cofactor-responsive subset of metabolic myopathy reverses. Every open item names its obstacle in the ledger.

Honest negatives are results, not failures

Three classes of disease have no restoration knob in this kernel. Recording that plainly, with the obstacle named, is the honest scientific outcome and matches the constitution’s open-grade discipline.

Developmental dosage dysplasias (CCD / RUNX2, campomelic / SOX9, Holt-Oram / TBX5)

There is no restoration knob. The master-switch crossing is a one-shot decision inside a closed developmental window, the spinodal-cliff commitment is already settled, and the formed skeleton is fixed. No postnatal intervention re-runs development; management is surgical and symptomatic, not dosage-restoring. (mechanism §8.)

Osteoarthritis cartilage regeneration

Unloading below the fatigue threshold arrests further cartilage-contact loss, which is verified, but the kernel has no matrix-resynthesis term and cartilage does not clinically regenerate, so already-lost contacts are not restored. Joint replacement substitutes hardware, outside the kernel. (mechanism §12.)

Established-tumour therapy versus primary prevention

The carcinogenesis kernel models initiation: a carcinogen dose lowers the R19 barrier, raising the Kramers crossing rate and the relative risk. Chemotherapy, resection and radiation kill already-transformed cells, which is not a barrier-restoration of the original switch, so therapy-response is out of scope [O].

Primary prevention is in scope and verified. Removing the carcinogen lowers the dose, raising the barrier back and lowering the initiation rate — the framework-native treatment claim for cancer is prevention, graded [V]. (mechanism §7.)

Metabolic / mitochondrial myopathy

Only a cofactor-responsive subset reverses. Supplementing riboflavin, CoQ10 or carnitine lengthens the fatigue time-constant and clears the non-recovering residual in that subset; the general primary-mitochondrial case has no kernel knob and is supportive only. (mechanism §11.)

Why stating limits strengthens the model

A model that reversed every disease would be tuned, not grounded. Because each treatment is the literal mirror of a DNA-grounded mechanism, the cases it cannot reverse are exactly the cases where biology has no single knob — a closed developmental window, an absent regeneration pathway, a post-transformation cell population.

Each open item above is listed in the irreproducibility ledger with its obstacle, as the constitution requires. The boundary is the evidence that the reversible results are mechanism, not curve-fitting.