Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 15153

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.43, p 0.247). This receipt's hash covers every field on it, plus the hash of receipt 15152, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 15153
    30 Oct 2026, 12:00 UTC

    PKN2

    dopamine neurons, braak

    predictionPKN2 in dopamine neurons tracks Braak Lewy-body stage

    registered4fae82beedc6af5c

    discovery+0.43 p=0.247 n=9

    replication-0.38 p=0.309 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.43, p 0.247)

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

    NO EFFECT

    65ce9dc5836ad731f29b6fca…
    follows bd9949ced74f…

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 15153: PKN2 in dopamine neurons, braak

power
full sample +0.37 (p 0.135, n 18), 95% CI -0.12 to +0.71. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.38 (p 0.118, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.43 (p 0.072, n 18). could be the mix.
skeptic
leave-one-out range +0.28 to +0.55, sign flips 0; without severely affected donors +0.37 (p 0.135, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PKN2 in dopamine neurons.

case closed: nothing better to follow up.