Gottlob Frege Quote

One cannot require that everything shall be defined, any more than one can require that a chemist shall decompose every substance.

In: Peter Geach and Max Black, Translations from the Philosophical Writings of Gottlob Frege - On Concept and Object (p. 42)

One cannot require that everything shall be defined, any more than one can require that a chemist shall decompose every substance.

One cannot require that everything shall be defined, any more than one can require that a chemist shall decompose every substance.

One cannot require that everything shall be defined, any more than one can require that a chemist shall decompose every substance.

One cannot require that everything shall be defined, any more than one can require that a chemist shall decompose every substance.