more from Gottlob Frege

Single Idea 18939

[catalogued under 5. Theory of Logic / F. Referring in Logic / 1. Naming / e. Empty names]

Full Idea

A logically perfect language should satisfy the conditions that every expression grammatically well constructed as a proper name out of signs already introduced shall in fact designate an object.

Gist of Idea

In a logically perfect language every well-formed proper name designates an object


Gottlob Frege (On Sense and Reference [1892], p.41)

Book Reference

Frege,Gottlob: 'Translations from the Writings of Gottlob Frege', ed/tr. Geach,P/Black,M [Blackwell 1980], p.70

A Reaction

This seems to cramp your powers of reasoning, if you must know the object to use the name ('Jack the Ripper'), and reasoning halts once you deny the object's existence ('Pegasus'), or you don't know if names co-refer ('Hesperus/Phosphorus').