Reliabilism, a category of theories in the
philosophical
Philosophy (from , ) is the systematized study of general and fundamental questions, such as those about existence, reason, knowledge, values, mind, and language. Such questions are often posed as problems to be studied or resolved. Some ...
discipline of
epistemology
Epistemology (; ), or the theory of knowledge, is the branch of philosophy concerned with knowledge. Epistemology is considered a major subfield of philosophy, along with other major subfields such as ethics, logic, and metaphysics.
Episte ...
, has been advanced as a theory both of
justification and of
knowledge
Knowledge can be defined as awareness of facts or as practical skills, and may also refer to familiarity with objects or situations. Knowledge of facts, also called propositional knowledge, is often defined as true belief that is distinc ...
. Process reliabilism has been used as an argument against
philosophical skepticism
Philosophical skepticism ( UK spelling: scepticism; from Greek σκέψις ''skepsis'', "inquiry") is a family of philosophical views that question the possibility of knowledge. It differs from other forms of skepticism in that it even reject ...
, such as the
brain in a vat
In philosophy, the brain in a vat (BIV) is a scenario used in a variety of thought experiments intended to draw out certain features of human conceptions of knowledge, reality, truth, mind, consciousness, and meaning. It is a modern incarnatio ...
thought experiment.
Process reliabilism is a form of
epistemic externalism.
Overview
A broadly reliabilist theory of knowledge is roughly as follows:
One knows that ''p'' (''p'' stands for any proposition
In logic and linguistics, a proposition is the meaning of a declarative sentence. In philosophy, " meaning" is understood to be a non-linguistic entity which is shared by all sentences with the same meaning. Equivalently, a proposition is the no ...
—e.g., that the sky is blue) if and only if ''p'' is true, one believes that ''p'' is true, and one has arrived at the belief that ''p'' through some ''reliable process.''
A broadly reliabilist theory of justified belief can be stated as follows:
One has a justified belief that ''p'' if, and only if, the belief is the result of a reliable process.
Moreover, a similar account can be given (and an elaborate version of this
has been given by
Alvin Plantinga
Alvin Carl Plantinga (born November 15, 1932) is an American analytic philosopher who works primarily in the fields of philosophy of religion, epistemology (particularly on issues involving epistemic justification), and logic.
From 1963 to 1982, ...
) for such notions as 'warranted belief' or 'epistemically rational belief'.
Leading proponents of reliabilist theories of knowledge and justification have included
Alvin Goldman
Alvin Ira Goldman (born 1938) 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.
Education and career
Goldman ea ...
,
Marshall Swain,
Kent Bach
Kent Bach (born 1943) is an American philosopher and Professor of Philosophy at San Francisco State University. His primary areas of research include the philosophy of language, linguistics and epistemology. He is the author of three books: ''Exi ...
and more recently, Alvin Plantinga. Goldman's article "
A Causal Theory of Knowing "A Causal Theory of Knowing" is a philosophical essay written by Alvin Goldman in 1967, published in ''The Journal of Philosophy''. It is based on existing theories of knowledge in the realm of epistemology, the study of philosophy through the scope ...
" (''Journal of Philosophy'', 64 (1967), pp. 357–372) is generally credited as being the first full treatment of the theory, though
D. M. Armstrong
David Malet Armstrong (8 July 1926 – 13 May 2014), often D. M. Armstrong, was an Australian philosopher. He is well known for his work on metaphysics and the philosophy of mind, and for his defence of a factualist ontology, a functiona ...
is also regarded as an important source, and (according to
Hugh Mellor
David Hugh Mellor (; 10 July 1938 – 21 June 2020) was a British philosopher. He was a Professor of Philosophy and Pro-Vice-Chancellor, later Professor Emeritus, of Cambridge University.
Biography
Mellor was born in London on 10 July 1938, ...
)
Frank Ramsey was the very first to state the theory, albeit in passing.
One classical or traditional
analysis
Analysis ( : analyses) is the process of breaking a complex topic or substance into smaller parts in order to gain a better understanding of it. The technique has been applied in the study of mathematics and logic since before Aristotle (38 ...
of 'knowledge' is ''
justified true belief
Definitions of knowledge try to determine the essential features of knowledge. Closely related terms are conception of knowledge, theory of knowledge, and analysis of knowledge. Some general features of knowledge are widely accepted among philoso ...
''. In order to have a valid claim of knowledge for any proposition, one must be justified in believing "p" and "p" must be true. Since
Gettier
Edmund Lee Gettier III (; October 31, 1927 – March 23, 2021) was an American philosopher at the University of Massachusetts Amherst. He is best known for his short 1963 article "Is Justified True Belief Knowledge?", which has generated an exten ...
proposed his counterexamples the traditional analysis has included the further claim that knowledge must be more than justified true belief. Reliabilist theories of knowledge are sometimes presented as an alternative to that theory: rather than justification, all that is required is that the belief be the product of a reliable process. But reliabilism need not be regarded as an alternative, but instead as a further explication of the traditional analysis. On this view, those who offer reliabilist theories of justification further analyze the 'justification' part of the traditional analysis of 'knowledge' in terms of reliable processes. Not all reliabilists agree with such accounts of justification, but some do.
Objections
Some find reliabilism of justification objectionable because it entails
externalism
Externalism is a group of positions in the philosophy of mind which argues that the conscious mind is not only the result of what is going on inside the nervous system (or the brain), but also what ''occurs'' or ''exists'' outside the subject. It i ...
, which is the view that one can have knowledge, or have a justified belief, despite not knowing (having "access" to) the evidence, or other circumstances, that make the belief justified. Most reliabilists maintain that a belief can be justified, or can constitute knowledge, ''even if'' the believer does not know about or understand the process that makes the belief reliable. In defending this view, reliabilists (and externalists generally) are apt to point to examples from simple acts of perception: if one sees a bird in the tree outside one's window and thereby gains the belief that there is a bird in that tree, one might not at all understand the cognitive processes that account for one's successful act of perception; nevertheless, it is the fact that the processes worked reliably that accounts for why one's belief is justified. In short, one finds one holds a belief about the bird, and that belief is justified if any is, but one is not acquainted at all with the processes that led to the belief that justified one's having it.
Another of the most common objections to reliabilism, made first to Goldman's reliable process theory of knowledge and later to other reliabilist theories, is the so-called generality problem. For any given justified belief (or instance of knowledge), one can easily identify many different (concurrently operating) "processes" from which the belief results. My belief that there is a bird in the tree outside my window might be accorded a result of the process of forming beliefs on the basis of sense-perception, of visual sense-perception, of visual sense-perception through non-opaque surfaces in daylight, and so forth, down to a variety of different very specifically described processes. Some of these processes might be statistically reliable, while others might not. It would no doubt be better to say, in any case, that we are choosing not which process to say resulted in the belief, but instead how to describe the process, out of the many different levels of generality on which it can be accurately described.
An objection in a similar line was formulated by
Stephen Stich
Stephen P. Stich (born May 9, 1943) 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 phi ...
in ''The Fragmentation of Reason''. Reliabilism usually considers that for generating justified beliefs a process needs to be reliable in a set of relevant possible scenarios. However, according to Stich, these scenarios are chosen in a culturally biased manner. Stich does not defend any alternative theory of knowledge or justification, but instead argues that all accounts of normative epistemic terms are culturally biased and instead only a pragmatic account can be given.
Another objection to reliabilism is called the ''new evil demon problem''.
The evil demon problem originally motivated
skepticism
Skepticism, also spelled scepticism, is a questioning attitude or doubt toward knowledge claims that are seen as mere belief or dogma. For example, if a person is skeptical about claims made by their government about an ongoing war then the pe ...
, but can be repurposed to object to reliabilist accounts as follows: If our experiences are controlled by an evil demon, it may be the case that we believe ourselves to be doing things that we are not doing. However, these beliefs are clearly justified.
Robert Brandom
Robert Boyce Brandom (born March 13, 1950) is an American philosopher who teaches at the University of Pittsburgh. He works primarily in philosophy of language, philosophy of mind and philosophical logic, and his academic output manifests both sys ...
has called for a clarification of the role of
belief
A belief is an attitude that something is the case, or that some proposition is true. In epistemology, philosophers use the term "belief" to refer to attitudes about the world which can be either true or false. To believe something is to take i ...
in reliabilist theories. Brandom is concerned that unless the role of belief is stressed, reliabilism may attribute knowledge to things that would otherwise be considered incapable of possessing it. Brandom gives the example of a parrot that has been trained to consistently respond to red visual stimuli by saying 'that's red'. The proposition is true, the mechanism that produced it is reliable, but Brandom is reluctant to say that the parrot ''knows'' it is seeing red because he thinks it cannot ''believe'' that it is. For Brandom, beliefs pertain to concepts: without the latter there can be no former. Concepts are products of the 'game of giving and asking for reasons'. Hence, only those entities capable of reasoning, through language in a social context, can for Brandom believe and thus have knowledge. Brandom may be regarded as hybridising
externalism
Externalism is a group of positions in the philosophy of mind which argues that the conscious mind is not only the result of what is going on inside the nervous system (or the brain), but also what ''occurs'' or ''exists'' outside the subject. It i ...
and
internalism
Internalism and externalism are two opposite ways of integration of explaining various subjects in several areas of philosophy. These include human motivation, knowledge, justification, meaning, and truth. The distinction arises in many areas of de ...
, allowing knowledge to be accounted for by reliable external process so long as a knower possess some internal understanding of why the belief is reliable.
References
External links
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{{skepticism
Epistemological theories
Internalism and externalism
Justification (epistemology)