Worldwide: The Website of Global Positivism. A Priori Justification and Knowledge. First published Sun Dec 9, 2007 Knowledge is generally thought to require justified true belief, even if justified true belief is not sufficient for knowledge as Edmund Gettier famously argued (1967). In Gettier cases the person, in some sense, is lucky to believe what is true on the basis of his evidence. For example, you see poodles in a field that have been bred and clipped to look just like sheep, and on the basis of what you see you form the belief that there are sheep in the field. Luckily there are—hiding out of sight behind some boulders! You have a justified true belief that is not knowledge. In lottery cases if you hold a losing ticket you have a justified true belief that it will lose, the justification resting on your knowledge that it is very likely that any given ticket will lose, but many think you do not know that your ticket will lose.
So having a justified true belief is not sufficient for knowledge, but it does seem necessary. 1. Consider the following analogy. 2. Epistemology. Philosophical study of knowledge The school of skepticism questions the human ability to attain knowledge while fallibilism says that knowledge is never certain. Empiricists hold that all knowledge comes from sense experience, whereas rationalists believe that some knowledge does not depend on it.
Coherentists argue that a belief is justified if it coheres with other beliefs. Foundationalists, by contrast, maintain that the justification of basic beliefs does not depend on other beliefs. Internalism and externalism debate whether justification is determined solely by mental states or also by external circumstances. Separate branches of epistemology focus on knowledge in specific fields, like scientific, mathematical, moral, and religious knowledge.
Early reflections on the nature, sources, and scope of knowledge are found in ancient Greek, Indian, and Chinese philosophy. Epistemology explores how people should acquire beliefs. . Major schools of thought [edit] Skepticism and fallibilism. Kant's Theory of Judgment. First published Wed Jul 28, 2004; substantive revision Sun Aug 4, 2013 Theories of judgment, whether cognitive (i.e., object-representing, thought-expressing, truth-apt) judgment or practical (i.e., act-representing, choice-expressing, evaluation-apt) judgment, bring together fundamental issues in semantics, logic, cognitive psychology, and epistemology (collectively providing for what can be called the four “faces” of cognitive judgment [see also Martin 2006]), as well as action theory, moral psychology, and ethics (collectively providing for the three “faces” of practical judgment): indeed, the notion of judgment is central to any general theory of human rationality. 1.
The Nature of Judgment 1.1 The power of judgment and the other faculties of cognition The power of judgment, while a non-basic faculty, is nevertheless the central cognitive faculty of the human mind. 1.2 Judgments are essentially propositional cognitions But what exactly are judgments? The Vienna Circle and Logical Positivism.