Philosophy Dictionary of Arguments

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A priori: something that we can know without prior (empirical) investigation. Is the inventory of a priori certainties purely logical? Is a priori knowledge always necessary?
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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.

 
Author Concept Summary/Quotes Sources

Logic Texts on A priori - Dictionary of Arguments

Read III 140 f
Apriori/Read: e.g., original meter: at least at one time, a meter was defined by reference to this original meter. Therefore, we could know a priori that the original meter was one meter long. Nonetheless, it could have been longer or shorter. "The original meter is a meter long" is only contingently true, but a priori recognizable.
The separation between the necessary and the a priori: surprising consequence: every a priori statement is equivalent with a contingent statement! Proof: III 142: equal truth values provide equivalence)
Read: ambiguous: a priori statements can all be contingent or necessary! >necessary a posteriori
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Distinction with a rigid designator for truth value: not "the truth value of A" but "the actual truth value of A". - Truth is not a property. >Rigidity.

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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. 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 Texts
Me I Albert Menne Folgerichtig Denken Darmstadt 1988
HH II Hoyningen-Huene Formale Logik, Stuttgart 1998
Re III Stephen Read Philosophie der Logik Hamburg 1997
Sal IV Wesley C. Salmon Logic, Englewood Cliffs, New Jersey 1973 - German: Logik Stuttgart 1983
Sai V R.M.Sainsbury Paradoxes, Cambridge/New York/Melbourne 1995 - German: Paradoxien Stuttgart 2001
Re III
St. Read
Thinking About Logic: An Introduction to the Philosophy of Logic. 1995 Oxford University Press
German Edition:
Philosophie der Logik Hamburg 1997

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