Philosophy Lexicon of Arguments

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Necessity, philosophy: different kinds of necessity are distinguished, differing in their strength. For example, physical, logical or metaphysical necessity. See also necessity de dicto, necessity de re.

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Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments.
 
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I 179
necessary / modal / Geach: it is even necessary necessary, that no one who is a brother is not male. Because if it were only contingently necessary , a non-male brother would still be a possible option, even if no real opportunity! (> NNa, MMa) - if Descartes had said that God would not necessarily have to create the necessity that a brother is male, he would have talked big nonsense.

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Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution.

Gea I
P.T. Geach
Logic Matters Oxford 1972


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Ed. Martin Schulz, access date 2017-06-23