Mathematical knowledge... is, in fact, merely verbal knowledge. "3" means "2+1", and "4" means "3+1". Hence it follows (though the proof is long) that "4" means the same as "2+2". Thus mathematical knowledge ceases to be mysterious.


Basic writings, 1903-1959 (ed. 1961)

Bertrand Russell Quotes

Mathematical knowledge... is, in fact, merely verbal knowledge. 3 means 2+1, and 4 means 3+1. Hence it follows (though the proof is long) that 4...

Mathematical knowledge... is, in fact, merely verbal knowledge. 3 means 2+1, and 4 means 3+1. Hence it follows (though the proof is long) that 4...

Mathematical knowledge... is, in fact, merely verbal knowledge. 3 means 2+1, and 4 means 3+1. Hence it follows (though the proof is long) that 4...

Mathematical knowledge... is, in fact, merely verbal knowledge. 3 means 2+1, and 4 means 3+1. Hence it follows (though the proof is long) that 4...