Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 6520

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.18, p 0.639). This receipt's hash covers every field on it, plus the hash of receipt 6519, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 6520
    22 Oct 2026, 14:26 UTC

    HSP90AA1

    dopamine neurons, braak

    predictionHSP90AA1 in dopamine neurons tracks Braak Lewy-body stage

    registered56a86b025098648f

    discovery+0.18 p=0.639 n=9

    replication+0.08 p=0.838 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.18, p 0.639)

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

    NO EFFECT

    7743982fc0dd17028709a8f5…
    follows 4acfcdee08d9…

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 6520: HSP90AA1 in dopamine neurons, braak

power
full sample +0.11 (p 0.677, n 18), 95% CI -0.38 to +0.55. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.11 (p 0.677, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.19 (p 0.455, n 18). could be the mix.
skeptic
leave-one-out range -0.01 to +0.23, sign flips 3; without severely affected donors +0.11 (p 0.677, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for HSP90AA1 in dopamine neurons.

case closed: nothing better to follow up.