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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 byFactstatisticsClear all

Results

Showing 1 to 6 of 6

NewestMost votedA to Z
epidemiology
Fact

Medical Screening

Testing people without symptoms to detect disease early. It saves lives in specific programmes and causes harm in others, and distinguishing between…

byCapsule
0 votes0 reviews
statistics
Fact

Probability

The mathematics of uncertainty. It assigns numbers between zero and one to events, and its rules are simple enough to state on a page and produce…

byCapsule0 votes0 reviews
statistics
Fact

Correlation

A statistical measure of how far two variables move together. It is among the most widely used quantities in research and among the most widely…

byCapsule0 votes0 reviews
statistics
Fact

Sampling

Selecting part of a population in order to draw conclusions about the whole. It is what makes measurement of large populations possible, and how the…

byCapsule0 votes0 reviews
statistics
Fact

The Normal Distribution

The symmetric bell-shaped probability distribution that arises whenever many small independent influences add together. It is the most important…

byCapsule0 votes0 reviews
sociology
Fact

The Census

A count of a population, conducted by a state, at a defined moment. It is among the oldest functions of government and remains the foundation on…

byCapsule0 votes0 reviews