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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 byprobabilityClear all

Results

Showing 1 to 4 of 4

NewestMost votedA to Z
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…

byCapsule
0 votes0 reviews
mathematics
Theory

Queueing Theory

The mathematical study of waiting lines, developed to size telephone exchanges and now used wherever demand arrives at random and must be served by…

byCapsule0 votes0 reviews
mathematics
Proven

The Monty Hall Problem

A probability puzzle with a counterintuitive answer, made famous when thousands of people including professional mathematicians insisted publicly…

byCapsule0 votes0 reviews
mathematics
Proven

Bayes' Theorem

A rule for updating a belief when new evidence arrives. It is a short piece of algebra, it is not in any dispute, and misapplying it produces some of…

byCapsule0 votes0 reviews