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Sixteenth-century portrait of John Calvin by an unknown artist. From the collection of the Bibliothèque de Genève (Library of Geneva)

In the "philosophy of religion, reformed epistemology is a school in philosophical thought concerning the nature of knowledge ("epistemology) as it applies to religious beliefs.[1] The central proposition of reformed epistemology is that beliefs can be justified by more than evidence alone, contrary to the positions of "evidentialism, which argues that while belief other than through evidence may be beneficial, it violates some epistemic duty.[2] Central to reformed epistemology is the proposition that belief in God may be ""properly basic" and not need to be inferred from other "truths to be rationally warranted.[3] "William Lane Craig describes reformed epistemology as "One of the most significant developments in contemporary Religious Epistemology...which directly assaults the evidentialist construal of rationality."[2]

"Alvin Plantinga distinguishes between what he calls de facto from de jure objections to Christian belief. A de facto objection is one that attempts to show that Christian truth claims are false. In contrast, de jure objections attempt to undermine Christian belief even if it is, in fact, true. Plantinga argues that there are no successful objections to Christian belief apart from de facto (fact-based) objections.[3]

"Reformed epistemology", was so named because it represents a continuation of the 16th century "Reformed theology of "John Calvin, who postulated a "sensus divinitatis, an innate divine awareness of God's presence.[4] More recent influences on reformed epistemology are found in philosopher "Nicholas Wolterstorff's Reason within the bounds,[5] published in 1976, and "modal logician Alvin Plantinga's Reason and belief in God,[6] published in 1983.

Although Plantinga's reformed epistemology developed over three decades it was not fully described until 1993 with the publishing of two in a series of three works: Warrant: The Current Debate,[3] and Warrant and Proper Function,[7] in 1993. The third in the series was Warranted Christian Belief,[8] published in 2000. Reformed epistemology is a position argued by William Lane Craig, "William Alston, and "Michael C. Rea.[9]


Concepts, definitions, and background[edit]

Plantinga's reformed epistemology includes two arguments against classical "foundationalism. The first grew out of his earlier argument in God and Other Minds (1967). In that work Plantinga argued that if our belief in other minds is rational without propositional or physical evidence, then belief in God is also rational. In his 1993 works, Plantinga argued that according to classical foundationalism most of us are irrational for having many beliefs we cannot justify, but which foundationalism does not accept as properly basic. Plantinga's second argument against classical foundationalism is that it is self-referentially incoherent. It fails the test of its own rules, which require that it be either self-evident, incorrigible, or evident to the senses.

In Plantinga's view, warrant is defined as the property of beliefs that makes them knowledge. Plantinga argues that a properly basic belief in God is warranted when produced by a sound mind, in an environment supportive of proper thought in accord with a design plan successfully aimed at truth.[10] Because there is an epistemically possible model according to which "theistic belief is properly basic and designed to form true belief in God, belief in God is warranted. Plantinga does not argue that this model is true, but makes the case that if the model is true if theistic belief is also likely true.["clarification needed]

This connection between the "truth value of theism and its positive epistemic status suggests to some that the goal of showing theistic belief to be externally warranted requires reasons for supposing that theism is true (Sudduth, 2000). This point is answered by many theistic arguments which provide sufficient propositional and physical evidence to warrant that belief, apart from reformed epistemology.

Calvin's epistemology[edit]

In his magnum opus, "Institutes of the Christian Religion (1536), "John Calvin states that the sum of human wisdom consists of two parts: the knowledge of God and of ourselves.[11] Calvin argues that the knowledge of God is not inherent in humanity nor can it be discovered by observing this world. The only way to obtain it is to study scripture. Calvin writes: "For anyone to arrive at God the Creator he needs Scripture as his Guide and Teacher."[12]

Calvin interpreted the following passages of the "Bible as teaching this epistemology:

Now faith is the substance of things hoped for, the evidence of things not seen.

— "Hebrews 11:1

For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known.

— "1st Corinthians 13:12

According to this line of reasoning,["by whom?]

Our science-dominated culture has ruled out religious experience as a clue to reality; but on what grounds? Science in the 1600s was so successful in understanding the physical dimension of reality that people in the 1700s began to think that the physical may be the only dimension of reality. But success in one area of inquiry does not invalidate other areas. The burden of proof is on those who would exclude a particular kind of experience from being a source of knowledge.[13]

Under this view, knowledge is not static and reason and evidence are not the only legitimate sources of knowledge. On the contrary, belief starts with the things that cannot be understood without scripture, and are legitimate insofar as scriptural knowledge answers questions that science is not addressing.

Plantinga's reformed epistemology[edit]

Alvin Plantinga's contributions to epistemology include an argument which he refers to as "Reformed epistemology". According to Reformed epistemology, belief in God can be rational and justified even without arguments or evidence for the existence of God. More specifically, Plantinga argues that belief in God is "properly basic, and due to a religious "externalist epistemology, he claims belief in God could be justified independently of evidence. His externalist epistemology, called "Proper functionalism", is a form of "epistemological "reliabilism.[14]

Plantinga discusses his view of Reformed epistemology and Proper functionalism in a three-volume series. In the first book of the trilogy, Warrant: The Current Debate, Plantinga introduces, analyzes, and criticizes 20th-century developments in analytic epistemology, particularly the works of "Chisholm, "BonJour (1943- ), "Alston (1921-2009), and "Goldman.[15] Plantinga argues that the theories of what he calls "warrant"—what many others have called "justification (Plantinga draws out a difference: justification is a property of a person holding a belief while warrant is a property of a belief)—put forth by these epistemologists have systematically failed to capture in full what is required for knowledge.[16]

In the second book, Warrant and Proper Function, he introduces the notion of warrant as an alternative to justification and discusses topics like self-knowledge, memories, perception, and probability.[17] Plantinga's "proper function" account argues that as a necessary condition of having warrant, one's "belief-forming and belief-maintaining apparatus of powers" are functioning properly—"working the way it ought to work".[18] Plantinga explains his argument for proper function with reference to a "design plan", as well as an environment in which one's cognitive equipment is optimal for use. Plantinga asserts that the design plan does not require a designer: "it is perhaps possible that "evolution (undirected by God or anyone else) has somehow furnished us with our design plans",[19] but the paradigm case of a design plan is like a technological product designed by a human being (like a radio or a wheel). Ultimately, Plantinga argues that epistemological "naturalism- i.e. "epistemology that holds that warrant is dependent on natural faculties – is best supported by supernaturalist metaphysics – in this case the belief in a "creator God or in some designer who has laid out a design plan that includes cognitive faculties conducive to attaining knowledge.[20]

According to Plantinga, a belief, B, is warranted if:

(1) the cognitive faculties involved in the production of B are functioning properly…; (2) your cognitive environment is sufficiently similar to the one for which your cognitive faculties are designed; (3) … the design plan governing the production of the belief in question involves, as purpose or function, the production of true beliefs…; and (4) the design plan is a good one: that is, there is a high statistical or objective probability that a belief produced in accordance with the relevant segment of the design plan in that sort of environment is true.[21]

Plantinga seeks to defend this view of proper function against alternative views of proper function proposed by other philosophers which he groups together as "naturalistic", including the "functional generalization" view of "John Pollock, the evolutionary/etiological account provided by "Ruth Millikan, and a dispositional view held by "John Bigelow and Robert Pargetter.[22] Plantinga also discusses his evolutionary argument against naturalism in the later chapters of Warrant and Proper Function.[23]

In 2000 Plantinga's third volume, Warranted Christian Belief, was published. In this volume, Plantinga's warrant theory is the basis for his theological end: providing a philosophical basis for Christian belief, an argument for why Christian theistic belief can enjoy warrant. In the book, he develops two models for such beliefs, the "A/C" ("Aquinas/"Calvin) model, and the "Extended A/C" model. The former attempts to show that a belief in God can be justified, warranted and rational, while the Extended model tries to show that specifically Christian theological beliefs including the "Trinity, the "Incarnation, the resurrection of "Christ, the "atonement, salvation etc.["clarification needed] Under this model, Christians are justified in their beliefs because of the work of the "Holy Spirit in bringing those beliefs about in the believer.

James Beilby has argued that the purpose of Plantinga's Warrant trilogy, and specifically of his Warranted Christian Belief, is firstly to make a form of argument against religion impossible—namely, the argument that whether or not Christianity is true, it is irrational—so "the skeptic would have to shoulder the formidable task of demonstrating the falsity of Christian belief"[24] rather than simply dismiss it as irrational. In addition, Plantinga is attempting to provide a philosophical explanation of how Christians should think about their own Christian belief.


Although reformed epistemology has been argued successfully by several theistic philosophers, it has both Christians and non-Christians critics.

Great Pumpkin Objection[edit]

Linus awaits "the Great Pumpkin in the comic "Peanuts.

A common objection, known as ""The Great Pumpkin Objection", which "Alvin Plantinga (1983) describes as follows:

It is tempting to raise the following sort of question. If belief in God can be properly basic, why cannot just any belief be properly basic? Could we not say the same for any bizarre aberration we can think of? What about voodoo or astrology? What about the belief that "the Great Pumpkin returns every Halloween? Could I properly take that as basic? Suppose I believe that if I flap my arms with sufficient vigor, I can take off and fly about the room; could I defend myself against the charge of irrationality by claiming this belief is basic? If we say that belief in God is properly basic, will we not be committed to holding that just anything, or nearly anything, can properly be taken as basic, thus throwing wide the gates to irrationalism and superstition? (p. 74)


Plantinga's answer to this line of thinking is that the objection simply assumes that the criteria for "proper basicality" propounded by "classical foundationalism (self-evidence, incorrigibility, and sense-perception) are the only possible criteria for properly basic beliefs. It is as if the Great Pumpkin objector feels that if properly basic beliefs cannot be arrived at by way of one of these criteria, then it follows that just 'any' belief could then be properly basic, precisely because there are no other criteria. But Plantinga says it simply doesn't follow from the rejection of classical foundationalist criteria that all possibility for criteria has been exhausted and this is exactly what the Great Pumpkin objection assumes.[6]

Plantinga takes his counter-argument further, asking how the great pumpkin objector "knows" that such criteria are the only criteria. The objector certainly seems to hold it as 'basic' that the classical foundationalist criteria are all that is available. Yet, such a claim is neither self-evident, incorrigible, nor evident to the senses. This rebuts the Great Pumpkin objection by demonstrating the classical foundationalist position to be internally incoherent, propounding an epistemic position which it itself does not follow.[6]


  1. ^ "The Epistemology of Religion". Stanford Encyclopedia of Philosophy. Retrieved 1 October 2016. 
  2. ^ a b Craig, William Lane. "Religious Epistemology". BeThinking. Retrieved 1 October 2016. 
  3. ^ a b c Plantinga, Alvin (1993). Warrant: The Current Debate (PDF). 1. Oxford: Oxford University Press. "ISBN "9780195078619. 
  4. ^ See Calvin's Institutes of the Christian Religion Bk. I, Chap. III.
  5. ^ Wolterstorff, Nicholas (1976). Reason within the bounds of religion. Eerdmans, William B. Publishing Company. "ISBN "9780802816436. 
  6. ^ a b c Plantinga, Alvin; Wolterstorff, Nicolas (1983). "'Reason and Belief in God' in Faith and Rationality". Notre Dame: University of Notre Dame Press: 16–93. 
  7. ^ Plantinga, Alvin (1993). Warrant and Proper Function. 2. Oxford University Press. "ISBN "9780195078640. 
  8. ^ Plantinga, Alvin (2000). Warranted Christian Belief. 3. Oxford: Oxford University Press. "ISBN "978-0195131925. 
  9. ^ Cowan, Steven (2000). Five Views on Apologetics. Grand Rapids, MI: Zondervan. pp. 19–20. "ISBN "978-0-310-22476-1. 
  10. ^ Warrant and Proper Function, New York: Oxford UP, 1993, viii
  11. ^ Niesel, Wilhelm (1980). The Theology of Calvin. Grand Rapids, Michigan: Baker Book House. pp. 23–24. "ISBN "0-8010-6694-8. 
  12. ^ Parker, T. H. L. (1995). Calvin: An Introduction to His Thought. London: Geoffrey Chapman. p. 21. "ISBN "0-225-66575-1. 
  13. ^
  14. ^ Compare "L'epistemologia riformata (Plantinga)", article on Philosophia Reformata. (in Italian) Accessed 3 May 2016
  15. ^ Alvin Plantinga, Warrant: The Current Debate, New York: Oxford University Press, 1993.
  16. ^ Plantinga, Warrant: The Current Debate, 1993. 3.
  17. ^ Alvin Plantinga, Warrant and Proper Function, New York: Oxford University Press, 1993.
  18. ^ WPF, p. 4
  19. ^ WPF, p. 21
  20. ^ WPF, 237.
  21. ^ Plantinga, Warrant and Proper Function, 1993. 194.
  22. ^ WPF, p. 199-211.
  23. ^ Fales, E. (1996). "Plantinga's Case against Naturalistic Epistemology". Philosophy of Science. 63 (3): 432–451. "doi:10.1086/289920. 
  24. ^ Beilby, James (2007). "Plantinga's Model of Warranted Christian Belief". In Baker, Deane-Peter. Alvin Plantinga. Cambridge: Cambridge University Press. pp. 125–165. "ISBN "0-521-67143-4. 


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