Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 0940

A sealed prediction that did not hold.

no effect in discovery (spearman rho -0.13, p 0.733). This receipt's hash covers every field on it, plus the hash of receipt 939, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 0940
    17 Oct 2026, 10:10 UTC

    PDE9A

    dopamine neurons, braak

    predictionPDE9A in dopamine neurons tracks Braak Lewy-body stage

    registered9872888a4fce2c22

    discovery-0.13 p=0.733 n=9

    replication-0.15 p=0.697 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho -0.13, p 0.733)

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

    NO EFFECT

    c9a923af911c45272c88880f…
    follows 8f57a96d4fcc…

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 0940: PDE9A in dopamine neurons, braak

power
full sample -0.31 (p 0.204, n 18), 95% CI -0.68 to +0.18. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.29 (p 0.239, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.44 (p 0.067, n 18). could be the mix.
skeptic
leave-one-out range -0.43 to -0.22, sign flips 0; without severely affected donors -0.31 (p 0.204, n 18). fragile.
cell type
strongest in oligodendrocytes: -0.67 (p 0.0025, n 18) vs -0.31 in dopamine neurons. proposing oligodendrocytes.
axis
no measure beats "tracks Braak Lewy-body stage" for PDE9A in dopamine neurons.

follow-up registered; not confirmed in substantia nigra, an independent cohort.
follow-up PDE9A · oligodendrocytes · braak: substantia nigra, an independent cohort (Parkinson's or LBD vs controls) +0.30 p 0.286 (needs p < 0.0014)