The invention of the laws of numbers was made on the basis of the error, dominant even from the earliest times, that there are identical things (but in fact nothing is identical with anything else); at least that there are things (but there is no “thing”). The assumption of plurality always presupposes the existence of something that occurs more than once: but precisely here error already holds sway, here already we are fabricating beings, unities which do not exist. [...] To a world which is not our idea the laws of numbers are wholly inapplicable: these are valid only in the human world.
Friedrich Nietzsche, Human, All Too Human, 19