---
title: "Falsifiability"
description: "The property of a claim that some possible observation could prove it false. Unfalsifiable claims cannot be tested and carry little evidential weight."
last_updated: "2026-08-02"
---

# Falsifiability

The property of a claim that some possible observation could prove it false. Unfalsifiable claims cannot be tested and carry little evidential weight.

*Example: "This diet works, and if it fails it's because you didn't believe hard enough" can never be proven wrong — which is the problem.*

## Sitemap

See the full [sitemap](https://www.criticalthinkingexercise.org/sitemap.md) for all pages.