[German Version]

Picking up on G. Frege's distinction between significance and meaning, R. Carnap articulated the distinction between extension and intension for the philosophy of language, which is of similar importance. He asserted that two singular terms have precisely the same extension when they refer to the same object (“evening star,” “morning star”); two predicates have the same extension when they coincide in reference to the same objects (“human being,” “living being with earlobes”); and two affirm…