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Peter D. Klein | |
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| Born | 1940 |
| Alma mater | Yale University, Colgate University |
| Era | Contemporary philosophy |
| Region | Western philosophy |
| School | Analytic philosophy |
Main interests | Epistemology |
Peter David Klein (born September 17, 1940) is an American philosopher specializing in issues in epistemology who spent most of his career at Rutgers University.
He received a BA at Earlham College (1962), and an MA (1964) and PhD from Yale University (1966).
He taught at Colgate University as an assistant professor from 1966 to 1970. Following that, he moved to Rutgers University, where he taught as an assistant professor from 1970 to 1973, an associate professor from 1973 to 1981, and a full professor from 1981 until retiring from Rutgers in 2016. [1]
Klein is widely known for his work on skepticism. His most influential work, however, is on the nature of knowledge, where he has long defended the defeasibility theory. His recent work defends infinitism about justification. On this view, to be justified in believing P is to possess a reason R1 to believe P, and a reason R2 to believe R1, and a reason R3.....and so on, ad infinitum. Justification is, so to speak, "turtles all the way down." He has also recently advocated a picture of knowledge according to which one can have knowledge of p even if the justification for the belief of p is essentially based on false premises. Klein calls these "useful falsehoods".
Klein authored one book: Certainty: A Refutation of Skepticism (1982) (University of Minnesota Press), and co-edited Ad Infinitum: New Essays on Epistemological Infinitism (Oxford University Press) with John Turri. He has published a number of articles, chapters, and reviews in epistemology.
Epistemology is the branch of philosophy concerned with knowledge. Epistemologists study the nature, origin, and scope of knowledge, epistemic justification, the rationality of belief, and various related issues. Debates in (contemporary) epistemology are generally clustered around four core areas:
Foundationalism concerns philosophical theories of knowledge resting upon non-inferential justified belief, or some secure foundation of certainty such as a conclusion inferred from a basis of sound premises. The main rival of the foundationalist theory of justification is the coherence theory of justification, whereby a body of knowledge, not requiring a secure foundation, can be established by the interlocking strength of its components, like a puzzle solved without prior certainty that each small region was solved correctly.
Justification is the property of belief that qualifies it as knowledge rather than mere opinion. Epistemology is the study of reasons that someone holds a rationally admissible belief. Epistemologists are concerned with various epistemic features of belief, which include the ideas of warrant, knowledge, rationality, and probability, among others.
In epistemology, the regress argument is the argument that any proposition requires a justification. However, any justification itself requires support. This means that any proposition whatsoever can be endlessly (infinitely) questioned, resulting in infinite regress. It is a problem in epistemology and in any general situation where a statement has to be justified.
Philosophical skepticism is a family of philosophical views that question the possibility of knowledge. It differs from other forms of skepticism in that it even rejects very plausible knowledge claims that belong to basic common sense. Philosophical skeptics are often classified into two general categories: Those who deny all possibility of knowledge, and those who advocate for the suspension of judgment due to the inadequacy of evidence. This distinction is modeled after the differences between the Academic skeptics and the Pyrrhonian skeptics in ancient Greek philosophy. In the latter sense, skepticism is understood as a way of life that helps the practitioner achieve inner peace. Some types of philosophical skepticism reject all forms of knowledge while others limit this rejection to certain fields, for example, to knowledge about moral doctrines or about the external world. Some theorists criticize philosophical skepticism based on the claim that it is a self-refuting idea since its proponents seem to claim to know that there is no knowledge. Other objections focus on its implausibility and distance from regular life.
Knowledge is a form of awareness or familiarity. It is often understood as awareness of facts or as practical skills, and may also mean familiarity with objects or situations. Knowledge of facts, also called propositional knowledge, is often defined as true belief that is distinct from opinion or guesswork by virtue of justification. While there is wide agreement among philosophers that propositional knowledge is a form of true belief, many controversies in philosophy focus on justification. This includes questions like whether justification is needed at all, how to understand it, and whether something else besides it is needed. These controversies intensified due to a series of thought experiments by Edmund Gettier and have provoked various alternative definitions. Some of them deny that justification is necessary and suggest alternative criteria. Others accept that justification is an essential aspect and formulate additional requirements.
In philosophical epistemology, there are two types of coherentism: the coherence theory of truth; and the coherence theory of justification.
Crispin James Garth Wright is a British philosopher, who has written on neo-Fregean (neo-logicist) philosophy of mathematics, Wittgenstein's later philosophy, and on issues related to truth, realism, cognitivism, skepticism, knowledge, and objectivity. He is Professor of Philosophical Research at the University of Stirling, and taught previously at the University of St Andrews, University of Aberdeen, New York University, Princeton University and University of Michigan.
Evidentialism is a thesis in epistemology which states that one is justified to believe something if and only if that person has evidence which supports said belief. Evidentialism is, therefore, a thesis about which beliefs are justified and which are not.
Laurence BonJour is an American philosopher and Emeritus of Philosophy at the University of Washington.
Alvin Ira Goldman is an American philosopher who is Emeritus Board of Governors Professor of Philosophy and Cognitive Science at Rutgers University in New Jersey and a leading figure in epistemology.
Keith Lehrer is Emeritus Regent's Professor of philosophy at the University of Arizona and a research professor of philosophy at the University of Miami, where he spends half of each academic year.
Stephen P. Stich is an American academic who is Distinguished Professor of Philosophy and Cognitive Science at Rutgers University, as well as an Honorary Professor in Philosophy at the University of Sheffield. Stich's main philosophical interests are in the philosophy of mind, epistemology, and moral psychology. His 1983 book, From Folk Psychology to Cognitive Science: The Case Against Belief, received much attention as he argued for a form of eliminative materialism about the mind. He changed his mind, in later years, as indicated in his 1996 book Deconstructing the Mind.
In epistemology, the Münchhausen trilemma is a thought experiment intended to demonstrate the theoretical impossibility of proving any truth, even in the fields of logic and mathematics, without appealing to accepted assumptions. If it is asked how any given proposition is known to be true, proof in support of that proposition may be provided. Yet that same question can be asked of that supporting proof, and any subsequent supporting proof. The Münchhausen trilemma is that there are only three ways of completing a proof:
Infinitism is the view that knowledge may be justified by an infinite chain of reasons. It belongs to epistemology, the branch of philosophy that considers the possibility, nature, and means of knowledge.
Michael Williams is a British philosopher who is currently Krieger-Eisenhower Professor in the Department of Philosophy at Johns Hopkins University, noted especially for his work in epistemology.
The following outline is provided as an overview of and topical guide to epistemology:
Keith DeRose is an American philosopher teaching at Yale University in New Haven, Connecticut, where he is currently Allison Foundation Professor of Philosophy. He taught previously at New York University and Rice University. His primary interests include epistemology, philosophy of language, philosophy of religion, and history of modern philosophy. He is best known for his work on contextualism in epistemology, especially as a response to the traditional problem of skepticism.
Epistemology or theory of knowledge is the branch of philosophy concerned with the nature and scope (limitations) of knowledge. It addresses the questions "What is knowledge?", "How is knowledge acquired?", "What do people know?", "How do we know what we know?", and "Why do we know what we know?". Much of the debate in this field has focused on analyzing the nature of knowledge and how it relates to similar notions such as truth, belief, and justification. It also deals with the means of production of knowledge, as well as skepticism about different knowledge claims.
Scott F. Aikin is an American philosopher and assistant professor of philosophy at Vanderbilt University in Nashville, Tennessee, where he also holds a joint appointment in Classics. He earned an M.A. in philosophy from the University of Montana in 1999 and a Ph.D. in philosophy from Vanderbilt University in 2006. His principal areas of research are epistemology, argumentation theory, ancient philosophy, and pragmatism.
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