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  2. Opposite - Wikipedia

    en.wikipedia.org/wiki/Opposite

    Such words are known as unpaired words. Opposites may be viewed as a special type of incompatibility. [1] Words that are incompatible create the following type of entailment (where X is a given word and Y is a different word incompatible with word X): [2] sentence A is X entails sentence A is not Y [3]

  3. Intersection (set theory) - Wikipedia

    en.wikipedia.org/wiki/Intersection_(set_theory)

    In set theory, the intersection of two sets and , denoted by , [1] is the set containing all elements of that also belong to or equivalently, all elements of that also belong to . [2] Notation and terminology

  4. List of paradoxes - Wikipedia

    en.wikipedia.org/wiki/List_of_paradoxes

    Cramer's paradox: The number of points of intersection of two higher-order curves can be greater than the number of arbitrary points needed to define one such curve. Elevator paradox : Elevators can seem to be mostly going in one direction, as if they were being manufactured in the middle of the building and being disassembled on the roof and ...

  5. Converse (semantics) - Wikipedia

    en.wikipedia.org/wiki/Converse_(semantics)

    Converses can be understood as a pair of words where one word implies a relationship between two objects, while the other implies the existence of the same relationship when the objects are reversed. [3] Converses are sometimes referred to as complementary antonyms because an "either/or" relationship is present between them. One exists only ...

  6. Antithesis - Wikipedia

    en.wikipedia.org/wiki/Antithesis

    An antithesis must always contain two ideas within one statement. The ideas may not be structurally opposite, but they serve to be functionally opposite when comparing two ideas for emphasis. [4] According to Aristotle, the use of an antithesis makes the audience better understand the point the speaker is trying to make. Further explained, the ...

  7. Symmetric difference - Wikipedia

    en.wikipedia.org/wiki/Symmetric_difference

    In mathematics, the symmetric difference of two sets, also known as the disjunctive union and set sum, is the set of elements which are in either of the sets, but not in their intersection. For example, the symmetric difference of the sets { 1 , 2 , 3 } {\displaystyle \{1,2,3\}} and { 3 , 4 } {\displaystyle \{3,4\}} is { 1 , 2 , 4 ...

  8. Oxymoron - Wikipedia

    en.wikipedia.org/wiki/Oxymoron

    Oxymorons are words that communicate contradictions. An oxymoron (plurals: oxymorons and oxymora) is a figure of speech that juxtaposes concepts with opposite meanings within a word or in a phrase that is a self-contradiction. As a rhetorical device, an oxymoron illustrates a point to communicate and reveal a paradox.

  9. 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. Their interdependence unites the seemingly opposed terms.