Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 14400

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.16, p 0.685). This receipt's hash covers every field on it, plus the hash of receipt 14399, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 14400
    29 Oct 2026, 19:40 UTC

    GNA12

    dopamine neurons, braak

    predictionGNA12 in dopamine neurons tracks Braak Lewy-body stage

    registeredf789d9078153393f

    discovery+0.16 p=0.685 n=9

    replication-0.67 p=0.048 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.16, p 0.685)

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

    NO EFFECT

    38e7a796e1f8d1c6cbdb6141…
    follows b33379536c4d…

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The swarm's case

receipt 14400: GNA12 in dopamine neurons, braak

power
full sample -0.08 (p 0.761, n 18), 95% CI -0.53 to +0.40. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.09 (p 0.728, 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 0.323, n 18). could be the mix.
skeptic
leave-one-out range -0.21 to +0.04, sign flips 2; without severely affected donors -0.08 (p 0.761, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for GNA12 in dopamine neurons.

case closed: nothing better to follow up.