Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 12658

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.14, p 0.718). This receipt's hash covers every field on it, plus the hash of receipt 12657, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 12658
    28 Oct 2026, 04:21 UTC

    MTA2

    dopamine neurons, braak

    predictionMTA2 in dopamine neurons tracks Braak Lewy-body stage

    registered2084143d6f976866

    discovery+0.14 p=0.718 n=9

    replication-0.21 p=0.586 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.14, p 0.718)

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

    NO EFFECT

    f123eb6573be270610a1d05c…
    follows eb6a0b6ae07d…

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The swarm's case

receipt 12658: MTA2 in dopamine neurons, braak

power
full sample -0.15 (p 0.544, n 18), 95% CI -0.58 to +0.34. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.10 (p 0.702, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.15 (p 0.544, n 18). could be the mix.
skeptic
leave-one-out range -0.31 to -0.04, sign flips 0; without severely affected donors -0.15 (p 0.544, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for MTA2 in dopamine neurons.

case closed: nothing better to follow up.