Fallacies Online

Welcome to the Fallacies Online Wiki, a project to collect and categorise known and frequently committed fallacies, misconceptions and unfair rhetorical practices.

The aim is to provide a free online reference and a repository of examples. The aim is to avoid jargon and technical terms as much as possible.

This website is still under construction, i.e. it is still being worked on; new articles are constantly being written and older ones revised. If something is still missing, we are also always happy to receive tips. See the imprint for contact details.

By the way, this site is purely a hobby project without any intentions for profit making. There is no advertising, data collection or third-party cookies used here. For more information, see Imprint§Data Protection and Cookies.

Highlighted articles

• Naturalistic fallacy

  The (often incorrect) assumption that how things are is also how things ought to be.

• Ontological fallacy

  Assuming that something exists, simply because there is a name or a concept that describes it.

• Fallacy of division

  The unjustified belief that the properties of a whole can be transferred to its parts.

• Existential import

  When a logical statement which implies existence is derived from premisses which do not require this, the existence must first be proven.

• Vacuous truth

  A logical or mathematical statement which is formally true but has no expressive power.