Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 7502

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.19, p 0.630). This receipt's hash covers every field on it, plus the hash of receipt 7501, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 7502
    23 Oct 2026, 11:39 UTC

    PTPRH

    dopamine neurons, braak

    predictionPTPRH in dopamine neurons tracks Braak Lewy-body stage

    registered47f4fcc543c167bb

    discovery-0.19 p=0.630 n=9

    replication-0.52 p=0.148 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.19, p 0.630)

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

    NO EFFECT

    edb270284685207bf721bf97…
    follows 4ca8a1b259ba…

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 7502: PTPRH 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: -0.15 (p 0.555, 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 0.164, n 18). could be the mix.
skeptic
leave-one-out range -0.34 to -0.12, 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 PTPRH in dopamine neurons.

case closed: nothing better to follow up.