The paper analyses Frege's approach to the identity conditions for the entity labelled by him as Sinn. It starts with a brief characterization of the main principles of Frege's semantics and lists his remarks on the identity conditions for Sinn. They are subject to a detailed scrutiny, and it is shown that, with the exception of the criterion of intersubstitutability in oratio obliqua, all other criteria have to be discarded. Finally, by comparing Frege's views on Sinn with Carnap's method of (...) extension and intension and the method of intensional isomorphism, it is proved that these methods do not provide a criterion for the identity of Frege's Sinn, even for extensional contexts, that the concept of intension does not coincide, as stated by Carnap, in these contexts, with Frege's concept of Sinn, and that Carnap's claim that in oratio obliqua Frege's semantics leads to an infinite hierarchy of Sinn entities can be questioned at least hypothetically in the light of certain new historical facts. (shrink)

The paper challenges a widely held interpretation of Frege's conception of logic on which the constituent clauses of basic law V have the same sense. I argue against this interpretation by first carefully looking at the development of Frege's thoughts in Grundlagen with respect to the status of abstraction principles. In doing so, I put forth a new interpretation of Grundlagen §64 and Frege's idea of ‘recarving of content’. I then argue that there is strong evidence in Grundgesetze that Frege (...) did not hold the relevant sense-identity claim regarding basic law V. (shrink)

Da bi ocenil Fregejev prispevek k utemeljitvi moderne logike se je avtor v svojem prispevku vrnil v preteklost, do Leibnizove lingua characteristica. Vzporednic ni težko najti: odprava dvoumja v govorici in zgradba enoznačnega jezika na tej osnovi, možnost razrešitve spoznavne moči s kalkulom, kar ločuje leibnizoviko tradicijo od kartezijanske. Srž obeh teorij je en in isti boj znanstvenega govora z govorico, razlika pa je v načinu, kako prehod k zapisu udejani ideal calculus ratiocinator. Različni načini, kako so elementi tega boja (...) med seboj povezani, lahko nudijo tudi osnove za premero specifike družbene razsežnosti obeh pristopov. (shrink)