Full Idea
None but a fool or a madman will ever pretend to dispute the authority of experience.
Gist of Idea
Only madmen dispute the authority of experience
Source
David Hume (Enquiry Conc Human Understanding [1748], IV.II.31)
Book Reference
Hume,David: 'Enquiries Conc. Human Understanding, Morals', ed/tr. Selby-Bigge/Nidditch [OUP 1975], p.36