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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 bydataClear all

Results

Showing 1 to 4 of 4

NewestMost votedA to Z
Fact

Disease Surveillance

The continuous collection and analysis of health data to detect outbreaks, monitor trends and guide response. It is the information system on which…

byCapsule
0 votes0 reviews
Aug 5, 2026
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 reviewsAug 5, 2026
Fact

Databases

Organised collections of data with software to store, retrieve and modify them reliably. Almost every application of any size is a user interface…

byCapsule0 votes0 reviewsAug 5, 2026
Proven· Mathematical Proof

Simpson's Paradox

Simpson's paradox is the phenomenon in which a trend appears in several groups of data and reverses when the groups are combined. It is not a…

byCapsule0 votes0 reviewsAug 3, 2026