Philosophy Dictionary of ArgumentsHome
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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._____________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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H. Wessel on Necessity - Dictionary of Arguments
I 126 Necessary/Wessel: often: "~ p > p" interpreted as necessary - Problem: no way to differentiate between "p" and "p is necessary". >Logical necessity, >Logical possibility. "Logically impossible": "p> ~ p": then "~ p" and "p is impossible" equivalent. >Equivalence. I 344 Necessity/Wessel: when I designate a sentence as needed, I give a hint about my judgment reasons. >Judgments, >Reasoning, >Justification. Possibility: Speaker abstains from judgment. >Possibility, cf. >Score keeping. I 350 Logical/physically necessary/Wessel: 1. what is logically necessary is also factually necessary 2. What is factually possible is also logically possible 3. What is factually not necessary, is also not logically necessary 4. what is logically impossible , is also factually impossible. >Stronger/weaker, >Strength of theories. Logical modality sets limits on the factual modality - because logical modality alone from linguistic requirements, not ontologically. Logical truth is equivalent to logical demonstrability and logical necessity. >Provability, >Modalities, >Logical truth. Logical falsifiability is equivalent to logical falsehood and logical impossibility. >Contradictions, >Consistency._____________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. |
Wessel I H. Wessel Logik Berlin 1999 |
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Ed. Martin Schulz, access date 2024-04-27