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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 byDebunkedClear all

Results

Showing 1 to 20 of 48

NewestMost votedA to Z
Debunked

Dowsing

The practice of locating underground water, minerals or other targets by walking over ground holding a forked stick or a pair of rods and watching…

byCapsule
0 votes0 reviews
Aug 4, 2026
Debunked

The Polygraph

The instrument popularly called a lie detector, which records breathing, blood pressure, pulse and skin conductance during questioning. It measures…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

The Ten Percent of the Brain Myth

The claim that human beings use only about ten per cent of their brains, and that the remainder is untapped potential. Every method of examining the…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Facilitated Communication

A technique in which an assistant supports the hand or arm of a non-speaking person while they type, said to reveal unsuspected literacy. Controlled…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Subliminal Advertising

The claim that messages flashed too briefly to be consciously seen can compel people to buy things. It rests on a single 1957 demonstration that its…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Mesmerism

Franz Anton Mesmer's doctrine that an invisible universal fluid flows through all bodies, that illness results from its obstruction, and that a…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Radium Quackery

The sale of radioactive substances as general health tonics in the first decades of the twentieth century. Radium was added to water, ointments,…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Lobotomy

The surgical severing of connections to the frontal lobes as a treatment for mental illness. It was performed on tens of thousands of people between…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Autointoxication

The doctrine that waste retained in the large intestine putrefies and poisons the body, causing a wide range of unrelated diseases. It was mainstream…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Stomach Ulcers and Stress

The belief that peptic ulcers are caused by stress, personality and diet, and that they are a chronic condition to be managed rather than cured. Most…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Telegony

The belief that a female's offspring can inherit characteristics from a male she mated with previously, even when he did not father them. It is…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Preformationism

The doctrine that an organism exists fully formed in miniature within the egg or the sperm, and that development is merely the enlargement of a…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Lysenkoism

The agricultural biology of Trofim Lysenko, adopted as official Soviet doctrine from the 1930s to the mid-1960s, which rejected genetics as a…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Recapitulation Theory

Ernst Haeckel's claim that an embryo passes through the adult forms of its ancestors as it develops, summarised as the slogan that ontogeny…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Water Memory

The claim that water retains a biological imprint of substances it once contained, after dilution so extreme that not a single molecule of the…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

The Planet Vulcan

A planet proposed to orbit between Mercury and the Sun, invoked to explain an anomaly in Mercury's orbit, searched for over half a century, and shown…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Polywater

A supposed polymeric form of water, reported from the Soviet Union in the 1960s and studied seriously worldwide for about a decade, which turned out…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

N-Rays

A form of radiation announced in 1903 by the French physicist Prosper-René Blondlot, investigated in dozens of laboratories, described in around…

byCapsule0 votes0 reviewsAug 4, 2026
Debunked

Breakfast as the Most Important Meal

The claim that eating breakfast is necessary for health and weight control, and that skipping it causes weight gain. The phrase was popularised by…

byCapsule0 votes0 reviewsAug 3, 2026
Debunked

Learning Styles

The idea that each person learns best through a particular sensory channel, and that teaching matched to that channel improves learning. It is…

byCapsule0 votes0 reviewsAug 3, 2026
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