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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 bymedicinecancerClear all

Results

Showing 1 to 4 of 4

NewestMost votedA to Z
Hypothesis

The Seed and Soil Hypothesis

The proposal that cancers spread to particular organs not by accident of circulation but because those tissues are hospitable to them. It was…

byCapsule
0 votes0 reviews
Aug 4, 2026
Hypothesis

The Warburg Effect

Cancer cells burn glucose wastefully, converting it to lactate even when oxygen is plentiful. The observation is a century old and undisputed, it is…

byCapsule0 votes0 reviewsAug 4, 2026
Proven

The Two-Hit Hypothesis

Cancer caused by loss of a tumour suppressor requires both copies of the gene to be knocked out. Alfred Knudson deduced this in 1971 from the…

byCapsule0 votes0 reviewsAug 4, 2026
Hypothesis

The Cancer Stem Cell Hypothesis

The proposal that tumours are sustained by a small subpopulation of cells with stem-like properties, and that killing the bulk of a tumour without…

byCapsule0 votes0 reviewsAug 3, 2026