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DebunkedThe PolygraphThe instrument popularly called a lie detector, which records breathing, blood pressure, pulse and skin conductance dur…

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The library

Capsules

1,028 capsules, each one classified by the strength of its evidence.

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered bymedicineevidenceClear all

Results

Showing 1 to 4 of 4

NewestMost votedA to Z
Hypothesis

The Inflammatory Hypothesis of Depression

The proposal that inflammation causes depression in some patients. The evidence is better than for the serotonin account it partly replaced, and the…

byCapsule
0 votes0 reviews
Aug 3, 2026
Hypothesis

The Gut-Brain Axis

The proposal that gut microbes influence mood, behaviour and neurological disease, and that altering them could treat psychiatric and…

byCapsule0 votes0 reviewsAug 3, 2026
Proven

Semmelweis and Handwashing

A Hungarian obstetrician worked out in 1847 that doctors were killing women in childbirth by carrying something on their hands from the dissection…

byCapsule0 votes0 reviewsAug 3, 2026
Proven

The Randomised Controlled Trial

Assign people to treatments by chance, and the groups differ only by chance. It is a simple idea, it is the most reliable method medicine has for…

byCapsule0 votes0 reviewsAug 3, 2026