Full Idea
The most strongly believed a priori 'truths' are for me provisional assumptions (e.g. the law of causality).
Gist of Idea
For me, a priori 'truths' are just provisional assumptions
Source
Friedrich Nietzsche (The Will to Power (notebooks) [1888], §497)
Book Reference
Nietzsche,Friedrich: 'The Will to Power', ed/tr. Kaufmann,W /Hollingdate,R [Vintage 1968], p.273
A Reaction
The example of causality would fit in with Humean scepticism, but presumably Nietzsche would also apply it to maths and logic, since he is a thorough-going relativist. I cautiously disagree.