Quote by Frege, Gottlob
"A concept is saturated when it has a clear and determinate extension."
"A concept is saturated when it has a clear and determinate extension."
"A thought is a proposition which we apprehend."
"The word 'number' is surely not without a sense; but when we have the sentence 'the number of roots of this equation is four', it seems very difficult to give the meaning of the word 'number' here."
"Functions are concepts; concepts are functions."
"The content of a thought may have different kinds of parts."