Look up Opposition in Wiktionary, the free dictionary.
Opposition may mean or refer to: Wikipedia does not have an article with this exact name. ... Wiktionary is a Wikimedia Foundation project intended to be a free wiki dictionary (hence: Wiktionary) (including thesaurus and lexicon) in every language. ...
This is a disambiguation page: a list of articles associated with the same title. If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
The point of this entry is to trace its history from the vantage point of the end of the twentieth century, along with closely related doctrines bearing on empty terms.
The square of opposition is a group of theses embodied in a diagram.
Its doctrine includes that of the square of opposition, but the discussion of the O form is so vague that nobody could pin down its exact truth conditions, and there is certainly no awareness indicated of problems of existential import.