philosophy Philosophy ('love of wisdom' in Ancient Greek) is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, Value (ethics and social sciences), value, mind, and language. It is a rational an ...

, (; ) is knowledge or understanding. The term ''

epistemology Epistemology is the branch of philosophy that examines the nature, origin, and limits of knowledge. Also called "the theory of knowledge", it explores different types of knowledge, such as propositional knowledge about facts, practical knowle ...

'' (the branch of philosophy concerning knowledge) is derived from .

History

Plato

Plato Plato ( ; Greek language, Greek: , ; born BC, died 348/347 BC) was an ancient Greek philosopher of the Classical Greece, Classical period who is considered a foundational thinker in Western philosophy and an innovator of the writte ...

, following

Xenophanes Xenophanes of Colophon ( ; ; – c. 478 BC) was a Greek philosopher, theologian, poet, and critic of Homer. He was born in Ionia and travelled throughout the Greek-speaking world in early classical antiquity. As a poet, Xenophanes was known f ...

, contrasts with : common belief or opinion. The term is also distinguished from : a craft or applied practice. In the ''

Protagoras Protagoras ( ; ; )Guthrie, p. 262–263. was a pre-Socratic Greek philosopher and rhetorical theorist. He is numbered as one of the sophists by Plato. In his dialogue '' Protagoras'', Plato credits him with inventing the role of the professional ...

'', Plato's

Socrates Socrates (; ; – 399 BC) was a Ancient Greek philosophy, Greek philosopher from Classical Athens, Athens who is credited as the founder of Western philosophy and as among the first moral philosophers of the Ethics, ethical tradition ...

notes that and are prerequisites for

prudence Prudence (, contracted from meaning "seeing ahead, sagacity") is the ability to govern and discipline oneself by the use of reason. It is classically considered to be a virtue, and in particular one of the four cardinal virtues (which are, ...

().

Aristotle

Aristotle Aristotle (; 384–322 BC) was an Ancient Greek philosophy, Ancient Greek philosopher and polymath. His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology, a ...

distinguished between five virtues of thought: , , , , and , with translating as "craft" or "art" and as "knowledge". A full account of is given in ''

Posterior Analytics The ''Posterior Analytics'' (; ) is a text from Aristotle's '' Organon'' that deals with demonstration, definition, and scientific knowledge. The demonstration is distinguished as ''a syllogism productive of scientific knowledge'', while the de ...

'', where Aristotle argues that knowledge of necessary, rather than contingent, truths regarding causation is foundational for . To emphasize the necessity, he uses

geometry Geometry (; ) is a branch of mathematics concerned with properties of space such as the distance, shape, size, and relative position of figures. Geometry is, along with arithmetic, one of the oldest branches of mathematics. A mathematician w ...

. Notably, Aristotle uses the notion of

cause Causality is an influence by which one event, process, state, or object (''a'' ''cause'') contributes to the production of another event, process, state, or object (an ''effect'') where the cause is at least partly responsible for the effect, ...

() in a broader sense than contemporary thought. For example, understanding how geometrical

axiom An axiom, postulate, or assumption is a statement that is taken to be true, to serve as a premise or starting point for further reasoning and arguments. The word comes from the Ancient Greek word (), meaning 'that which is thought worthy or ...

s lead to a

theorem In mathematics and formal logic, a theorem is a statement (logic), statement that has been Mathematical proof, proven, or can be proven. The ''proof'' of a theorem is a logical argument that uses the inference rules of a deductive system to esta ...

about properties of triangles counts as understanding the ''cause'' of the proven property of the right triangle. As a result, is a virtue of thought that deals with what cannot be otherwise, while and deal with what is contingent.

Contemporary interpretations

Michel Foucault

For

Foucault Paul-Michel Foucault ( , ; ; 15 October 192625 June 1984) was a French historian of ideas and philosopher who was also an author, literary critic, political activist, and teacher. Foucault's theories primarily addressed the relationships be ...

, an is the guiding unconsciousness of subjectivity within a given epoch – subjective parameters which form an historical ''

a priori ('from the earlier') and ('from the later') are Latin phrases used in philosophy to distinguish types of knowledge, Justification (epistemology), justification, or argument by their reliance on experience. knowledge is independent from any ...

''. He uses the term () in his ''

The Order of Things ''The Order of Things: An Archaeology of the Human Sciences'' (''Les Mots et les Choses: Une archéologie des sciences humaines'') is a book by French philosopher Michel Foucault. It proposes that every historical period has underlying epistemi ...

'', in a specialized sense to mean the historical, non-temporal, ''a priori'' knowledge that grounds truth and

discourse Discourse is a generalization of the notion of a conversation to any form of communication. Discourse is a major topic in social theory, with work spanning fields such as sociology, anthropology, continental philosophy, and discourse analysis. F ...

s, thus representing the condition of their possibility within a particular

epoch In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured. The moment of epoch is usually decided b ...

. In the book, Foucault describes :

In any given culture and at any given moment, there is always only one that defines the conditions of possibility of all knowledge, whether expressed in a theory or silently invested in a practice.

In subsequent writings, he makes it clear that several may co-exist and interact at the same time, being parts of various

power-knowledge In critical theory, power-knowledge is a term introduced by the French philosopher Michel Foucault (). According to Foucault's understanding, power is based on knowledge and makes use of knowledge; on the other hand, power reproduces knowledge by ...

systems. Foucault attempts to demonstrate the constitutive limits of discourse, and in particular, the rules enabling their productivity; however, Foucault maintains that, though

ideology An ideology is a set of beliefs or values attributed to a person or group of persons, especially those held for reasons that are not purely about belief in certain knowledge, in which "practical elements are as prominent as theoretical ones". Form ...

may infiltrate and form science, it need not do so: it must be demonstrated how ideology actually forms the science in question; contradictions and lack of objectivity are not an indicator of ideology.

Jean Piaget Jean William Fritz Piaget (, ; ; 9 August 1896 – 16 September 1980) was a Swiss psychologist known for his work on child development. Piaget's theory of cognitive development and epistemological view are together called genetic epistemology. ...

has compared Foucault's use of with

Thomas Kuhn Thomas Samuel Kuhn (; July 18, 1922 – June 17, 1996) was an American History and philosophy of science, historian and philosopher of science whose 1962 book ''The Structure of Scientific Revolutions'' was influential in both academic and ...

's notion of a

paradigm In science and philosophy, a paradigm ( ) is a distinct set of concepts or thought patterns, including theories, research methods, postulates, and standards for what constitute legitimate contributions to a field. The word ''paradigm'' is Ancient ...

References