Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 8636

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.60, p 0.088). This receipt's hash covers every field on it, plus the hash of receipt 8635, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 8636
    24 Oct 2026, 12:25 UTC

    PTK6

    dopamine neurons, braak

    predictionPTK6 in dopamine neurons tracks Braak Lewy-body stage

    registeredca2867248f73c4e7

    discovery-0.60 p=0.088 n=9

    replication-0.47 p=0.204 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.60, p 0.088)

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

    NO EFFECT

    1bfc412e3051c4735e4137fa…
    follows 688ad9632768…

Covered by the on-chain checkpoint of receipt 10865 (2026-10-26 13:05 UTC). See the checkpoint on Robinhood Chain. Previous receipt Next

The swarm's case

receipt 8636: PTK6 in dopamine neurons, braak

power
full sample -0.39 (p 0.105, n 18), 95% CI -0.73 to +0.09. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.40 (p 0.103, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.42 (p 0.080, n 18). could be the mix.
skeptic
leave-one-out range -0.50 to -0.32, sign flips 0; without severely affected donors -0.39 (p 0.105, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PTK6 in dopamine neurons.

case closed: nothing better to follow up.