Applied Logic without Psychologism

Mariusz Urbański LOGIC AND COGNITION : Two Faces of Psychologism

In this paper two concepts of psychologism in logic are outlined: the one which Frege and Husserl fought against and the new psychologism, or cognitivism, which underlies a cognitive turn in contemporary logic. Four issues such cognitively oriented logic should be interested in are indicated. They concern: new fields opened for logical analysis, new methods and tools needed to address these fie...

Logic and Cognition: Two Faces of Psychologism

In this paper two concepts of psychologism in logic are outlined: the one which Frege and Husserl fought against and the new psychologism, or cognitivism, which underlies a cognitive turn in contemporary logic. Four issues such cognitively oriented logic should be interested in are indicated. They concern: new fields opened for logical analysis, new methods and tools needed to address these fie...

Is Logic all in our Heads? From Naturalism to Psychologism

Psychologism in logic is the doctrine that the semantic content of logical terms is in some way a feature of human psychology. We consider the historically influential version of the doctrine, Psychological Individualism, and the many counter-arguments to it. We then propose and assess various modifications to the doctrine that might allow it to avoid the classical objections. We call these Psy...

Logic or Psychologism: Smedslund's Psycho-Logic and Health.

Cognitive Illusions and the Welcome Psychologism of Logicist Artificial Intelligence

We begin by using Johnson-Laird’s ingenious cognitive illusions (in which it seems that certain propositions can be deduced from given information, but really can’t) to raise the spectre of a naive brand of psychologism. This brand of psychologism would seem to be unacceptable, but an attempt to refine it in keeping with some suggestive comments from Jacquette eventuates in a welcome version of...