Formal Logic by P. Lorenzen (Paperback, 2010)

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By P. Lorenzen, Frederick J. Crosson. (Cf. SCHOLZ, 1931). (On the dependence of logic on natural language, English, for example, compare Section 1 and 8). The form itself can thus be represented by replacing the given predicates by variables.

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Logic , one of the central words in Western intellectual history, compre hends in its meaning such diverse things as the Aristotelian syllogistic, the scholastic art of disputation, the transcendental logic of the Kantian critique, the dialectical logic of Hegel, and the mathematical logic of the Principia Mathematica of Whitehead and Russell. The term Formal Logic , following Kant is generally used to distinguish formal logical reasonings, precisely as formal, from the remaining universal truths based on reason. (Cf. SCHOLZ, 1931). A text-book example of a formal-logical inference which from Some men are philosophers and All philosophers are wise concludes that Some men are wise is called formal, because the validity of this inference depends only on the form ofthe given sentences -in particular it does not depend on the truth or falsity of these sentences. (On the dependence of logic on natural language, English, for example, compare Section 1 and 8). The form of a sentence like Some men are philosophers , is that which remains preserved when the given predicates, here men and philosophers are replaced by arbitrary ones. The form itself can thus be represented by replacing the given predicates by variables. Variables are signs devoid of meaning, which may serve merely to indicate the place where meaningful constants (here the predicates) are to be inserted. As variables we shall use - as did Aristotle - letters, say P, Q and R, as variables for predicates.

Product Identifiers

PublisherSpringer
ISBN-139789048183302
eBay Product ID (ePID)178394003

Product Key Features

Book TitleFormal Logic
Publication Year2010
FormatPaperback
LanguageEnglish
AuthorP. Lorenzen
TopicPopular Philosophy
Number of Pages123 Pages

Dimensions

Item Height235 mm
Item Width155 mm
Item Weight219 g
Volume9

Additional Product Features

Country/Region of ManufactureNetherlands
Title_AuthorP. Lorenzen
Series TitleSynthese Library
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