Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 12866

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.13, p 0.735). This receipt's hash covers every field on it, plus the hash of receipt 12865, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 12866
    28 Oct 2026, 09:13 UTC

    OR4K13

    dopamine neurons, braak

    predictionOR4K13 in dopamine neurons tracks Braak Lewy-body stage

    registeredb732736b3f20a46c

    discovery+0.13 p=0.735 n=9

    replication+0.37 p=0.329 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.13, p 0.735)

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

    NO EFFECT

    7e7fcd00addc91881c83500e…
    follows 0e1161dfe172…

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The swarm's case

receipt 12866: OR4K13 in dopamine neurons, braak

power
full sample +0.20 (p 0.424, n 18), 95% CI -0.29 to +0.61. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: +0.17 (p 0.498, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: +0.32 (p 0.194, n 18). could be the mix.
skeptic
leave-one-out range +0.11 to +0.35, sign flips 0; without severely affected donors +0.20 (p 0.424, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for OR4K13 in dopamine neurons.

case closed: nothing better to follow up.