être en contradiction - definição. O que é être en contradiction. Significado, conceito
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O que (quem) é être en contradiction - definição

FORM OF INDIRECT PROOF THAT ESTABLISHES THE TRUTH OR VALIDITY OF A PROPOSITION
Indirect proof; Prove by contradiction; Proof by Contradiction; Proofs by contradiction; Refutation by contradiction

Être Dieu         
OPERA
Etre Dieu
Être Dieu: opéra-poème, audiovisuel et cathare en six parties (French for "Being God: a Cathar Audiovisual Opera-Poem in Six Parts") is a self-proclaimed "opera-poem" written by Spanish surrealist painter Salvador Dalí, based on a libretto by Manuel Vázquez Montalbán with music by French avant-garde musician Igor Wakhévitch. It was originally published in 1985.
En (typography)         
UNIT OF MEASUREMENT IN THE FIELD OF TYPOGRAPHY, HALF OF AN EM
En space; En (unit); En (measurement); U+2002; En-space; Enspace
An en is a typographic unit, half of the width of an em. By definition, it is equivalent to half of the body height of the typeface (e.
En Kitō         
JAPANESE MANGA ARTIST
En Kito
is a Japanese manga artist and illustrator. While working as a dōjin artist, she was in charge of the key drawings for the adult game Heart de Network (Euphony Production) in 2000.

Wikipédia

Proof by contradiction

In logic, proof by contradiction is a form of proof that establishes the truth or the validity of a proposition, by showing that assuming the proposition to be false leads to a contradiction. Although it is quite freely used in mathematical proofs, not every school of mathematical thought accepts this kind of nonconstructive proof as universally valid.

More broadly, proof by contradiction is any form of argument that establishes a statement by arriving at a contradiction, even when the initial assumption is not the negation of the statement to be proved. In this general sense, proof by contradiction is also known as indirect proof, proof by assuming the opposite, and reductio ad impossibile.

A mathematical proof employing proof by contradiction usually proceeds as follows:

  1. The proposition to be proved is P.
  2. We assume P to be false, i.e., we assume ¬P.
  3. It is then shown that ¬P implies falsehood. This is typically accomplished by deriving two mutually contradictory assertions, Q and ¬Q, and appealing to the law of noncontradiction.
  4. Since assuming P to be false leads to a contradiction, it is concluded that P is in fact true.

An important special case is the existence proof by contradiction: in order to demonstrate that an object with a given property exists, we derive a contradiction from the assumption that all objects satisfy the negation of the property.