Theory of justification in the context of "Coherentism"

Reliabilism, a category of theories in the philosophical discipline of epistemology, has been advanced as a theory both of justification and of knowledge. Process reliabilism has been used as an argument against philosophical skepticism, such as the brain in a vat thought experiment.Process reliabilism is a form of epistemic externalism.

Alvin Carl Plantinga (born November 15, 1932) is an American analytic philosopher and theologian who works primarily in the fields of philosophy of religion, epistemology (particularly on issues involving epistemic justification), and logic.

From 1963 to 1982, Plantinga taught at Calvin University before accepting an appointment as the John A. O'Brien Professor of Philosophy at the University of Notre Dame. He later returned to Calvin University to become the inaugural holder of the Jellema Chair in Philosophy.

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.

The argument is also known as diallelus (Latin) or diallelon, from Greek di' allelon "through or by means of one another" and as the epistemic regress problem. It is an element of the Münchhausen trilemma.

Communicative rationality or communicative reason (German: kommunikative Rationalität) is a theory or set of theories which describes human rationality as a necessary outcome of successful communication. This theory is in particular tied to the philosophy of German philosophers Karl-Otto Apel and Jürgen Habermas, and their program of universal pragmatics, along with its related theories such as those on discourse ethics and rational reconstruction. This view of reason is concerned with clarifying the norms and procedures by which agreement can be reached, and is therefore a view of reason as a form of public justification.

According to the theory of communicative rationality, the potential for certain kinds of reason is inherent in communication itself. Building from this, Habermas has tried to formalize that potential in explicit terms. According to Habermas, the phenomena that need to be accounted for by the theory are the "intuitively mastered rules for reaching an understanding and conducting argumentation", possessed by subjects who are capable of speech and action. The goal is to transform this implicit "know-how" into explicit "know-that", i.e. knowledge, about how we conduct ourselves in the realm of "moral-practical" reasoning.

Reflective equilibrium is a state of balance or coherence among a set of beliefs arrived at by a process of deliberative mutual adjustment among general principles and particular judgements. Although he did not use the term, philosopher Nelson Goodman introduced the method of reflective equilibrium as an approach to justifying the principles of inductive logic (this is now known as Goodman's method). The term reflective equilibrium was coined by John Rawls and popularized in his A Theory of Justice as a method for arriving at the content of the principles of justice.

Dietmar Hübner (de) has pointed out that there are many interpretations of reflective equilibrium that deviate from Rawls' method in ways that reduce the cogency of the idea. Among these misinterpretations, according to Hübner, are definitions of reflective equilibrium as "(a) balancing theoretical accounts against intuitive convictions; (b) balancing general principles against particular judgements; (c) balancing opposite ethical conceptions or divergent moral statements".

A transcendental argument is a kind of deductive argument that appeals to the necessary conditions that make experience and knowledge possible. Transcendental arguments may have additional standards of justification which are more demanding than those of traditional deductive arguments. The philosopher Immanuel Kant gave transcendental arguments both their name and their notoriety.

A proof is sufficient evidence or a sufficient argument for the truth of a proposition.

The concept applies in a variety of disciplines,with both the nature of the evidence or justification and the criteria for sufficiency being area-dependent. In the area of oral and written communication such as conversation, dialog, rhetoric, etc., a proof is a persuasive perlocutionary speech act, which demonstrates the truth of a proposition. In any area of mathematics defined by its assumptions or axioms, a proof is an argument establishing a theorem of that area via accepted rules of inference starting from those axioms and from other previously established theorems. The subject of logic, in particular proof theory, formalizes and studies the notion of formal proof. In some areas of epistemology and theology, the notion of justification plays approximately the role of proof, while in jurisprudence the corresponding term is evidence,with "burden of proof" as a concept common to both philosophy and law.