Quote by Frege, Gottlob

"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."

Frege, Gottlob Knowledge
Logician-Mathematician German 1848–1925

More from Frege, Gottlob

"A thought is a proposition which we apprehend."
"Functions are concepts; concepts are functions."
"The content of a thought may have different kinds of parts."
"A concept is a function whose value is always a truth-value."

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