Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 7506

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.41, p 0.272). This receipt's hash covers every field on it, plus the hash of receipt 7505, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 7506
    23 Oct 2026, 11:44 UTC

    SACM1L

    dopamine neurons, braak

    predictionSACM1L in dopamine neurons tracks Braak Lewy-body stage

    registered29c9d2891ef97c28

    discovery+0.41 p=0.272 n=9

    replication+0.04 p=0.910 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.41, p 0.272)

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

    NO EFFECT

    56062773c958361e019e32c5…
    follows 9a1c8bf5a33e…

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 7506: SACM1L in dopamine neurons, braak

power
full sample +0.28 (p 0.269, n 18), 95% CI -0.22 to +0.66. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.33 (p 0.188, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.33 (p 0.182, n 18). could be the mix.
skeptic
leave-one-out range +0.18 to +0.39, sign flips 0; without severely affected donors +0.28 (p 0.269, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for SACM1L in dopamine neurons.

case closed: nothing better to follow up.