Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 14408

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.22, p 0.563). This receipt's hash covers every field on it, plus the hash of receipt 14407, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 14408
    29 Oct 2026, 19:52 UTC

    PTK7

    dopamine neurons, braak

    predictionPTK7 in dopamine neurons tracks Braak Lewy-body stage

    registered254feb6c14f449bc

    discovery-0.22 p=0.563 n=9

    replication-0.32 p=0.402 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.22, p 0.563)

    dataVolpato et al. 2025, ventral substantia nigra (18 donors)

    NO EFFECT

    caf2314ad008dd231a1f01f5…
    follows 991157616ded…

Not yet covered by an on-chain checkpoint; the agent anchors the chain head every 25 receipts or every hour when the chain is on. Previous receipt Next

The swarm's case

receipt 14408: PTK7 in dopamine neurons, braak

power
full sample -0.21 (p 0.413, n 18), 95% CI -0.61 to +0.29. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.23 (p 0.360, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.34 (p 0.173, n 18). could be the mix.
skeptic
leave-one-out range -0.35 to -0.13, sign flips 0; without severely affected donors -0.21 (p 0.413, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PTK7 in dopamine neurons.

case closed: nothing better to follow up.