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  2. Necessity and sufficiency - Wikipedia

    en.wikipedia.org/wiki/Necessity_and_sufficiency

    The sun being above the horizon is a necessary condition for direct sunlight; but it is not a sufficient condition, as something else may be casting a shadow, e.g., the moon in the case of an eclipse. The assertion that Q is necessary for P is colloquially equivalent to "P cannot be true unless Q is true" or "if Q is false, then P is false".

  3. List of grammatical cases - Wikipedia

    en.wikipedia.org/wiki/List_of_grammatical_cases

    ^† This case is called lokál in Czech and Slovak, miejscownik in Polish, місцевий (miscevý) in Ukrainian and месны (miesny) in Belarusian; these names imply that this case also covers locative case. ^‡ The prepositional case in Scottish Gaelic is classically referred to as a dative case. Vocative case

  4. Thesaurus - Wikipedia

    en.wikipedia.org/wiki/Thesaurus

    Thesaurus Linguae Latinae. A modern english thesaurus. A thesaurus (pl.: thesauri or thesauruses), sometimes called a synonym dictionary or dictionary of synonyms, is a reference work which arranges words by their meanings (or in simpler terms, a book where one can find different words with similar meanings to other words), [1] [2] sometimes as a hierarchy of broader and narrower terms ...

  5. Modal verb - Wikipedia

    en.wikipedia.org/wiki/Modal_verb

    A modal verb is a type of verb that contextually indicates a modality such as a likelihood, ability, permission, request, capacity, suggestion, order, obligation, necessity, possibility or advice. Modal verbs generally accompany the base (infinitive) form of another verb having semantic content. [1]

  6. Grammatical case - Wikipedia

    en.wikipedia.org/wiki/Grammatical_case

    The English word case used in this sense comes from the Latin casus, which is derived from the verb cadere, "to fall", from the Proto-Indo-European root ḱh₂d-. [8] The Latin word is a calque of the Greek πτῶσις, ptôsis, lit. "falling, fall". [9] The sense is that all other cases are considered to have "fallen" away from the nominative.

  7. Wiktionary - Wikipedia

    en.wikipedia.org/wiki/Wiktionary

    Wiktionary (UK: / ˈ w ɪ k ʃ ən ər i / ⓘ, WIK-shə-nər-ee; US: / ˈ w ɪ k ʃ ə n ɛr i / ⓘ, WIK-shə-nerr-ee; rhyming with "dictionary") is a multilingual, web-based project to create a free content dictionary of terms (including words, phrases, proverbs, linguistic reconstructions, etc.) in all natural languages and in a number of artificial languages.

  8. Necessary - Wikipedia

    en.wikipedia.org/wiki/Necessary

    Necessary and sufficient condition, in logic, something that is a required condition for something else to be the case; Necessary proposition, in logic, a statement about facts that is either unassailably true (tautology) or obviously false (contradiction) Metaphysical necessity, in philosophy, a truth which is true in all possible worlds

  9. Wikipedia:Glossary - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Glossary

    A page that contains various meanings of a word, and refers to the pages where the various meanings are defined. In cases when there is a prevailing meaning of the term, disambiguation pages are named "subject (disambiguation)" when there is a primary topic. See (Wikipedia:Disambiguation) Disambiguator, disambiguation tag