Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 1939

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.11, p 0.779). This receipt's hash covers every field on it, plus the hash of receipt 1938, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 1939
    18 Oct 2026, 10:07 UTC

    FAM171A1

    dopamine neurons, braak

    predictionFAM171A1 in dopamine neurons tracks Braak Lewy-body stage

    registered1eb546abf1e1f070

    discovery+0.11 p=0.779 n=9

    replication-0.90 p=0.0011 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.11, p 0.779)

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

    NO EFFECT

    b8d85599acd4967bab4db56b…
    follows 2d22709c83a6…

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 1939: FAM171A1 in dopamine neurons, braak

power
full sample -0.57 (p 0.014, n 18), 95% CI -0.82 to -0.14. the interval excludes zero: something may be there, smaller than a half can see.
confounder
adjusted for sex: -0.60 (p 0.0089, n 18). holds up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.53 (p 0.023, n 18). not the mix.
skeptic
leave-one-out range -0.74 to -0.51, sign flips 0; without severely affected donors -0.57 (p 0.014, n 18). robust.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for FAM171A1 in dopamine neurons.

case closed: nothing better to follow up.