Braak stage 1, 100% of pigmented neurons left
parkinsonconnecting

Receipt 12766

A sealed prediction that did not hold.

no effect in discovery (spearman rho +0.00, p 1.000). This receipt's hash covers every field on it, plus the hash of receipt 12765, so changing any earlier receipt would break every one after it. Your browser recomputes it below.

The slip

  1. PARKINSON RECEIPTno. 12766
    28 Oct 2026, 06:52 UTC

    XYLT1

    dopamine neurons, braak

    predictionXYLT1 in dopamine neurons tracks Braak Lewy-body stage

    registeredcbb95e03d85fbd9b

    discovery+0.00 p=1.000 n=9

    replication-0.41 p=0.269 n=9

    neededp < 0.05 twice, same sign

    no effect in discovery (spearman rho +0.00, p 1.000)

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

    NO EFFECT

    e870028009c060ecfd02ff9c…
    follows 446493cd0b37…

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The swarm's case

receipt 12766: XYLT1 in dopamine neurons, braak

power
full sample -0.10 (p 0.683, n 18), 95% CI -0.54 to +0.38. the interval is wide: not enough donors to tell.
confounder
adjusted for sex: -0.09 (p 0.709, n 18). does not hold up.
composition
dopamine neurons share of nuclei vs axis +0.05 (p 0.854); controlling for it: -0.34 (p 0.170, n 18). could be the mix.
skeptic
leave-one-out range -0.24 to +0.01, sign flips 1; without severely affected donors -0.10 (p 0.683, n 18). fragile.
cell type
no other cell group does better.
axis
no measure beats "tracks Braak Lewy-body stage" for XYLT1 in dopamine neurons.

case closed: nothing better to follow up.