Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 2677

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.26, p 0.493). This receipt's hash covers every field on it, plus the hash of receipt 2676, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 2677
    19 Oct 2026, 02:44 UTC

    PRRT2

    dopamine neurons, braak

    predictionPRRT2 in dopamine neurons tracks Braak Lewy-body stage

    registeredba540fdbb54bb341

    discovery-0.26 p=0.493 n=9

    replication-0.32 p=0.407 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.26, p 0.493)

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

    NO EFFECT

    e708e7940f0282c0bd5d35e1…
    follows 65e2dd1fe5e2…

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 2677: PRRT2 in dopamine neurons, braak

power
full sample -0.23 (p 0.365, n 18), 95% CI -0.63 to +0.27. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.19 (p 0.444, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.25 (p 0.319, n 18). could be the mix.
skeptic
leave-one-out range -0.35 to -0.11, sign flips 0; without severely affected donors -0.23 (p 0.365, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for PRRT2 in dopamine neurons.

case closed: nothing better to follow up.