A Defence of Common Sense (1925) by George Edward Moore
	All Life Is Problem Solving (1994) by Karl Popper
	Comus (1634) by John Milton
	Conjectures and Refutations: The Growth of Scientific Knowledge (1963) by Karl Popper
	Discourse on the Method (1637) by Rene Descartes
	Filters Against Folly: How to Survive Despite Economists, Ecologists, and the Merely Eloquent (1985) by Garrett Hardin
	How to Make Our Ideas Clear (1878) by Charles Sanders Peirce
	Meditations on First Philosophy (1641) by Rene Descartes
	Objections and Replies (to the Meditations) (1641) by Rene Descartes
	Objective Knowledge: An Evolutionary Approach (1972) by Karl Popper
	On Certainty (1969) by Ludwig Wittgenstein
	On Practice (1937) by Mao Tse-Tung
	Personal Knowledge (1958) by Michael Polanyi
	Proof of an External World (1939) by George Edward Moore
	The Fixation of Belief (1877) by Charles Sanders Peirce
	The Formation of the Scientific Mind (1938) by Gaston Bachelard
	The Function of Reason (1929) by Alfred North Whitehead
	The New Scientific Spirit (1934) by Gaston Bachelard
	The Refutation of Idealism (1903) by George Edward Moore
	The Tacit Dimension (1966) by Michael Polanyi
	Truth and Truthfulness: An Essay in Genealogy (2002) by Bernard Williams