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  2. Necessity and sufficiency - Wikipedia

    en.wikipedia.org/wiki/Necessity_and_sufficiency

    A number's being divisible by 4 is sufficient (but not necessary) for it to be even, but being divisible by 2 is both sufficient and necessary for it to be even. Example 3 An occurrence of thunder is a sufficient condition for the occurrence of lightning in the sense that hearing thunder, and unambiguously recognizing it as such, justifies ...

  3. Verification and validation - Wikipedia

    en.wikipedia.org/wiki/Verification_and_validation

    Verification and validation (also abbreviated as V&V) are independent procedures that are used together for checking that a product, service, or system meets requirements and specifications and that it fulfills its intended purpose. [1] These are critical components of a quality management system such as ISO 9000. The words "verification" and ...

  4. Biological tests of necessity and sufficiency - Wikipedia

    en.wikipedia.org/wiki/Biological_tests_of...

    It is a necessary condition that an object has four sides if it is true that it is a square; conversely, the object being a square is a sufficient condition for it to be true that an object has four sides. [4] Four distinct combinations of necessity and sufficiency are possible for a relationship of two conditions. A first condition may be:

  5. Mutatis mutandis - Wikipedia

    en.wikipedia.org/wiki/Mutatis_mutandis

    Mutatis mutandis is a Medieval Latin phrase meaning "with things changed that should be changed" or "once the necessary changes have been made", literally: having been changed, going to be changed. [ 1 ] [ 2 ] [ 3 ] It continues to be seen as a foreign-origin phrase (and thus, unnaturalized, meaning not integrated as part of native vocabulary ...

  6. Wikipedia : Manual of Style/Abbreviations

    en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

    The full word should be used in most cases, but it is conventional to use an abbreviation in certain contexts. In sports, it is "vs." or "vs", depending on dialect. In law, the usage is "v." or "v", depending on jurisdiction. In other contexts, use "vs." when abbreviation is necessary (e.g., in a compact table).

  7. Von - Wikipedia

    en.wikipedia.org/wiki/Von

    According to German alphabetical sorting, people with von in their surnames – of noble or non-noble descent alike – are listed in telephone books and other files under the rest of their names (e.g., the economist Ludwig von Mises would have been found under M in the phone book rather than V).

  8. Deep structure and surface structure - Wikipedia

    en.wikipedia.org/wiki/Deep_structure_and_surface...

    For example, the sentences "Pat loves Chris" and "Chris is loved by Pat" mean roughly the same thing and use similar words. Some linguists, Chomsky in particular, have tried to account for this similarity by positing that these two sentences are distinct surface forms that derive from a common (or very similar [ 1 ] ) deep structure.

  9. Quine–Putnam indispensability argument - Wikipedia

    en.wikipedia.org/wiki/Quine–Putnam...

    Quine thought it is important to translate our best scientific theories into first-order logic because ordinary language is ambiguous, whereas logic can make the commitments of a theory more precise. Translating theories to first-order logic also has advantages over translating them to higher-order logics such as second-order logic .