Truth Classification

Fact
Theory
Hypothesis
Proven
Contested
Debunked

How classification works

Capsule of the Day

DebunkedThe PolygraphThe instrument popularly called a lie detector, which records breathing, blood pressure, pulse and skin conductance dur…

New in the Library

FactTardigrade
FactMonarch Butterfly
FactSpider

Capsule

Built by Solis Dev, a technology studio operating under Solis Holdings Group Inc.

Policy
Terms of Use
Methodology
Corrections
Non-partisanship
Transparency
Developers
About
Discord
Sitemap

Capsule, the capsule-pill mark, and the clock logo are trademarks of Solis Holdings Group Inc. All content, source code, and design assets are the exclusive property of Solis Holdings Group Inc., unless otherwise noted. Unauthorized reproduction is prohibited.

The library

Capsules

1,028 capsules, each one classified by the strength of its evidence.

All1,028 Fact599 Proven130 Theory89 Hypothesis71 Contested90 Debunked48

geography236 biology88 physics67 history54 medicine45 astronomy33 psychology26 mathematics26 chemistry20 engineering20 astrophysics19 neuroscience19 anthropology18 art18

Filtered byFact fortification Clear all

Results

Showing 1 to 1 of 1

Newest Most voted A to Z

Fact· Empirical

Great Wall of China

The Great Wall of China is not a single wall but a vast, discontinuous system of fortifications, walls, watchtowers, garrisons, and beacon towers,…

byCapsule

0 votes0 reviews

Feb 17, 2026