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necessary |
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necessary 1. Logic a. (of a statement, formula, etc.) true under all interpretations or in all possible circumstances b. (of a proposition) determined to be true by its meaning, so that its denial would be self-contradictory c. (of a property) essential, so that without it its subject would not be the entity it is d. (of an inference) always yielding a true conclusion when its premises are true; valid e. (of a condition) entailed by the truth of some statement or the obtaining of some state of affairs 2. Philosophy (in a nonlogical sense) expressing a law of nature, so that if it is in this sense necessary that all As are B, even although it is not contradictory to conceive of an A which is not B, we are licensed to infer that if something were an A it would have to be B How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Thus disease and health are naturally present in the body of an animal, and it is necessary that either the one or the other should be present in the body of an animal. It was necessary that Romulus should not remain in Alba, and that he should be abandoned at his birth, in order that he should become King of Rome and founder of the fatherland. But, in order that the moon should reach the zenith of a given place, it is necessary that the place should not exceed in latitude the declination of the luminary; in other words, it must be comprised within the degrees 0@ and 28@ of lat. |
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