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Capsule of the Day

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 byContestedepidemiologyClear all

Results

Showing 1 to 3 of 3

NewestMost votedA to Z
Contested

Salt and Blood Pressure

That reducing salt lowers blood pressure is established. Whether population-wide salt reduction reduces deaths, and how low is low enough, is one of…

byCapsule
0 votes0 reviews
Aug 3, 2026
Contested

Dietary Fat and Heart Disease

The proposition that saturated fat raises cholesterol and thereby causes heart disease shaped dietary guidelines across the developed world for fifty…

byCapsule0 votes0 reviewsAug 3, 2026
Contested

Overdiagnosis

Overdiagnosis is the correct detection of a condition that would never have caused symptoms or harm during the person's life. It is not misdiagnosis…

byCapsule0 votes0 reviewsAug 3, 2026