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Ideas for 'fragments/reports', 'A World of States of Affairs' and 'The Will to Power (notebooks)'

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2 ideas

6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / a. Units

20361	We need 'unities' for reckoning, but that does not mean they exist [Nietzsche]
	Full Idea: We need 'unities' in order to be able to reckon: that does not mean we must suppose that such unities exist.
	From: Friedrich Nietzsche (The Will to Power (notebooks) [1888], §635)
	A reaction: True. I takes this thought to be important in the Psychology of Metaphysics (an unfashionable branch).

6. Mathematics / C. Sources of Mathematics / 9. Fictional Mathematics

4533	Logic and maths refer to fictitious entities which we have created [Nietzsche]
	Full Idea: Logic (like geometry and arithmetic) applies only to fictitious entities that we have created.
	From: Friedrich Nietzsche (The Will to Power (notebooks) [1888], §516)
	A reaction: This finds Nietzsche on the relativist wing of logical empiricism. The thing is, fictitious entities can have a close relationship with truth, as in a great novel. I believe in necessary logical truth, but there are many ways of slicing it.