|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._____________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. |
Peter Geach on Necessity - Dictionary of Arguments
Necessary/modality/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.
>Possibility, >Necessity, >Logical possibility, >Logical necessity, >Axioms, >Systems, cf. >S4/S5.
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._____________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. Translations: Dictionary of Arguments The note [Concept/Author], [Author1]Vs[Author2] or [Author]Vs[term] resp. "problem:"/"solution:", "old:"/"new:" and "thesis:" is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition.
Logic Matters Oxford 1972