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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 byFactmeasurementClear all

Results

Showing 1 to 6 of 6

NewestMost votedA to Z
Fact

Accounting

The systematic recording and reporting of financial activity. Double-entry bookkeeping is among the more consequential inventions in the history of…

byCapsule
0 votes0 reviews
Aug 5, 2026
Fact

Cartography

The making of maps. Every map is a deliberate distortion, because the surface of a sphere cannot be laid flat without stretching something, and every…

byCapsule0 votes0 reviewsAug 5, 2026
Fact

Timekeeping

Measuring the passage of time and dividing it into units. Every method works by counting something that repeats regularly, and the history of the…

byCapsule0 votes0 reviewsAug 5, 2026
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 reviewsAug 5, 2026
Fact

The Uncertainty Principle

The result that certain pairs of physical properties cannot both have precisely defined values at the same time. It is a statement about what quantum…

byCapsule0 votes0 reviewsAug 5, 2026
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 reviewsAug 5, 2026