About fallacy.is
fallacy.is is a reference for logical fallacies, cognitive biases, and rhetorical devices. Each entry has a short URL you can paste into any discussion to call out a pattern without writing a paragraph.
How to use it
When you see a fallacy, reply with the link:
fallacy.is/straw-manfallacy.is/whataboutismfallacy.is/ad-hominem
Most entries also accept short aliases. fallacy.is/ah and fallacy.is/adhom both redirect to ad hominem, for example.
What belongs here
The site isn't limited to textbook fallacies. It covers the broader family of reasoning errors and persuasion techniques worth naming: classical fallacies, cognitive biases, rhetorical devices, and debate tactics. Pedants can quibble about the taxonomy. Arguments in the wild don't.
Editorial stance
Definitions are neutral. Examples have bite. The site doesn't take sides — calling something a fallacy is a point about structure, not about who said it.
Contributing
Corrections and suggestions are welcome. If an entry is wrong or an example misfires, say so.