Glymour, Clark The Hierarchies of Knowledge and the Mathematics of Discovery Department of Philosophy technical report learning;induction;logic;relativism;epistemology 1991-02-01
    https://kilthub.cmu.edu/articles/journal_contribution/The_Hierarchies_of_Knowledge_and_the_Mathematics_of_Discovery/6492800
10.1184/R1/6492800.v1