Jisho

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Noun, Suru verb, No-adjective
1. negation; denial; repudiation; disavowal
  • その
  • ニュース
  • かのじょ彼女
  • おお大きな
  • ショック
  • あた与えた
  • こと
  • ひてい否定
  • しよう
  • ない
  • It is not to be denied but that the news was a great shock to her.
2. NOT operationComputer terminology
Wikipedia definition
3. NegationIn logic and mathematics, negation, also called logical complement, is an operation on propositions, truth values, or semantic values more generally. Intuitively, the negation of a proposition is true when that proposition is false, and vice versa. In classical logic negation is normally identified with the truth function that takes truth to falsity and vice versa.
Read “Negation” on English Wikipedia
Read “否定” on Japanese Wikipedia
Read “Negation” on DBpedia

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