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Logic and Logical Philosophy

Metalogical properties, being logical and being formal
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Metalogical properties, being logical and being formal

Authors

  • Jan Woleński Jagiellonian University, Kraków

DOI:

https://doi.org/10.12775/LLP.2002.013

Abstract

The predicate ‘being logical’ has at least four applications. We can apply it to concepts, propositions, sets of propositions (systems, theories) and methods. The concepts of quantifier or disjunction are logical but those of horse or water are not. Some propositions, for instance, the principle of excluded middle, are logical, others, for instance the law of gravity, are not. Propositional calculus is a logical theory (belongs to logic), but the theory of evolution is not. In a sense, the problem of logical propositions reduces itself to the question of logical systems, because we can say that A is logical if and only if it belongs to a logical systems (however, see below). Finally, deduction is a logical method of justification, but observation is not.

Author Biography

Jan Woleński, Jagiellonian University, Kraków

Institute of Philosophy

References

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Woleński, J. 1995, “Logicism and the concept of logic”, in I. Max and W. Stelzner (eds.), Mathematik und Logik. Frege-Kolloquium Jena 1993, Berlin: Walter de Gruyter, pp. 111–119.

Woleński, J. 1995, “Mathematics and logic”, in W. de Pauli-Schimanowich, E. Köhler and F. Stadler (Eds.), The Foundational Debate, Dordrecht Academic Publishers, pp. 197–210.

Woleński, J. 1999, “Logic from a metalogical point of view”, in E. Orłowska (Ed.), Logic at Work. Essays Dedicated to the Memory of Helena Rasiowa, Berlin: Physica-Verlag, pp. 25–35.

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Published

2004-01-19

How to Cite

1.
WOLEŃSKI, Jan. Metalogical properties, being logical and being formal. Logic and Logical Philosophy. Online. 19 January 2004. Vol. 10, no. 10, p. 211–221. [Accessed 7 July 2025]. DOI 10.12775/LLP.2002.013.
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