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  2. Square of opposition - Wikipedia

    en.wikipedia.org/wiki/Square_of_opposition

    In the modern square of opposition, A and O claims are contradictories, as are E and I, but all other forms of opposition cease to hold; there are no contraries, subcontraries, subalternations, and superalternations. Thus, from a modern point of view, it often makes sense to talk about 'the' opposition of a claim, rather than insisting, as ...

  3. Opposite - Wikipedia

    en.wikipedia.org/wiki/Opposite

    An auto-antonym is a word that can have opposite meanings in different contexts or under separate definitions: enjoin (to prohibit, issue injunction; to order, command) fast (moving quickly; fixed firmly in place) cleave (to split; to adhere) sanction (punishment, prohibition; permission) stay (remain in a specific place, postpone; guide ...

  4. Contradiction - Wikipedia

    en.wikipedia.org/wiki/Contradiction

    Definition. A system will be said to be inconsistent if it yields the assertion of the unmodified variable p [S in the Newman and Nagel examples]. In other words, the notion of "contradiction" can be dispensed when constructing a proof of consistency; what replaces it is the notion of "mutually exclusive and exhaustive" classes.

  5. Law of thought - Wikipedia

    en.wikipedia.org/wiki/Law_of_thought

    "As Mrs. LADD·FRANKLlN has truly remarked (BALDWIN, Dictionary of Philosophy and Psychology, article "Laws of Thought"), the principle of contradiction is not sufficient to define contradictories; the principle of excluded middle must be added which equally deserves the name of principle of contradiction.

  6. Unity of opposites - Wikipedia

    en.wikipedia.org/wiki/Unity_of_opposites

    The unity of opposites is the philosophical idea that opposites are interconnected due to the way each is defined in relation to the other. Their interdependence unites the seemingly opposed terms.

  7. Semiotic square - Wikipedia

    en.wikipedia.org/wiki/Semiotic_square

    Semiotic square. The semiotic square, also known as the Greimas square, is a tool used in structural analysis of the relationships between semiotic signs through the opposition of concepts, such as feminine-masculine or beautiful-ugly, and of extending the relevant ontology.

  8. AP Psychology - Wikipedia

    en.wikipedia.org/wiki/AP_Psychology

    Advanced Placement (AP) Psychology (also known as AP Psych) and its corresponding exam are part of the College Board's Advanced Placement Program.This course is tailored for students interested in the field of psychology and as an opportunity to earn Advanced Placement credit or exemption from a college-level psychology course.

  9. Law of noncontradiction - Wikipedia

    en.wikipedia.org/wiki/Law_of_noncontradiction

    In logic, the law of non-contradiction (LNC) (also known as the law of contradiction, principle of non-contradiction (PNC), or the principle of contradiction) states that contradictory propositions cannot both be true in the same sense at the same time, e. g. the two propositions "the house is white" and "the house is not white" are mutually exclusive.