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Archiv für Geschichte der Philosophie

Ed. by Horn, Christoph / Serck-Hanssen, Camilla

Together with Carriero, John / Meyer, Susan Sauvé

Editorial Board Member: Adamson, Peter / Allen, James V. / Bartuschat, Wolfgang / Curley, Edwin M / Emilsson, Eyjólfur Kjalar / Floyd, Juliet / Förster, Eckart / Frede, Dorothea / Friedman, Michael / Garrett, Don / Grasshoff, Gerd / Irwin, Terence / Kahn, Charles H. / Knuuttila, Simo / Koistinen, Olli / Kraut, Richard / Longuenesse, Béatrice / McCabe, Mary / Pasnau, Robert / Perler, Dominik / Reginster, Bernard / Simmons, Alison / Timmermann, Jens / Trifogli, Cecilia / Weidemann, Hermann / Zöller, Günter

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Is Logic a Theoretical or Practical Discipline? Kant and/or Bolzano

Anita Kasabova1


Citation Information: Archiv für Geschichte der Philosophie. Volume 84, Issue 3, Pages 319–333, ISSN (Online) 1613-0650, ISSN (Print) 0003-9101, DOI: 10.1515/agph.84.3.319, February 2008

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Does logic describe something or not? If not, is it a normative or practical discipline? Is there a radical division between the practical or normative level and the theoretical or descriptive level? A discipline is theoretical, we may say, if its main propositions contain descriptive expressions, such as “is” or “have”, but no normative expressions, such as “ought”, “ought not” or “may”. A discipline is normative if its main propositions are of the form “it ought to be”. Theoretical propositions express what is, whereas practical propositions express what should be. So a theoretical discipline is descriptive and a normative discipline is prescriptive, but what does a theoretical discipline describe?

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