Loading subject…
A posteriori
A posteriori knowledge is knowledge that is justified through sensory experience and empirical observation rather than through pure reasoning alone. The concept, contrasted with a priori knowledge, is central to the analytic/synthetic distinction: while analytic truths hold by definition, synthetic a posteriori truths, such as "water boils at 100 degrees Celsius," require investigation of the world to be confirmed or refuted.
Analytic/synthetic distinction
The analytic/synthetic distinction divides meaningful propositions into analytic statements, which are true by virtue of meaning alone (e.g. 'all bachelors are unmarried'), and synthetic statements, which are true or false by virtue of how the world is (e.g. 'the cat is on the mat'). Quine challenged and Kripke complicated this division.
Reliabilism
Reliabilism is an externalist theory of justification holding that a belief is justified if it is produced by a cognitive process that reliably generates true beliefs. The believer need not be aware of the process's reliability for the belief to count as justified.