The fallacy of exclusive premises is a syllogistic fallacy committed in a categorical syllogism that is invalid because both of its premises are negative.
Example of an EOO-4 invalid proposition:
- E Proposition: No mammals are fish.
- O Proposition: Some fish are not whales.
- O Proposition: Therefore, some whales are not mammals.
This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.