Justified True Belief

Intro Properly Basic Christian Belief: In contrast to approaches that make arguments and evidence the epistemic foundation of faith, Reformed Epistemology (as represented by Kelly James Clark, drawing on Alvin Plantinga and the Reformed tradition) maintains that belief in God--and even many specifically Christian beliefs--can be properly basic. That is, such beliefs can be rational, warranted, and justified without being inferred from other beliefs by way of argument or evidence.

On this view, the human mind is created with a sensus divinitatis, a natural disposition to form beliefs about God in the right circumstances (for example, in response to the grandeur of creation, moral experience, or the reading of Scripture). For the Christian, the internal testimony of the Holy Spirit plays a central role: the Spirit works through Scripture, preaching, sacrament, and the life of the church to produce and sustain belief in the great truths of the gospel. These beliefs, formed in the appropriate epistemic environment, can enjoy full warrant even if the believer is unable to produce apologetic arguments.

Reformed Epistemology does not forbid or despise apologetics. It challenges a particular picture of rationality--often called classical foundationalism--which implies that a belief is rational only if it is either self‑evident, incorrigible, evident to the senses, or based on beliefs of that privileged sort. Instead, Reformed Epistemology offers a more theologically informed account of rationality on which God himself structures our cognitive faculties in such a way that trusting his self‑disclosure is not a failure of reason, but its proper exercise.

(P1) If God exists and has created humans with cognitive faculties aimed at truth, it is reasonable to expect that belief in God could be formed in a basic way--without relying on inferential arguments from other beliefs. + Plantinga and Clark argue that, given theism, it is not ad hoc to suppose that God would build into human nature a tendency to form beliefs about him. Just as people form basic beliefs about the external world, the past, and other minds without argument, so they might also form basic beliefs about God in appropriate circumstances. This expectation flows naturally from a theistic worldview in which God desires to be known and has designed our cognitive equipment accordingly.

(P2) In the Christian case, belief in God and in the central truths of the gospel can arise from the sensus divinitatis and the internal testimony of the Holy Spirit operating through Scripture and the life of the church. + According to the Reformed tradition, the sensus divinitatis disposes humans to form theistic beliefs when they encounter creation, conscience, and providence. For specifically Christian beliefs (for example, that God was in Christ reconciling the world to himself), the work of the Spirit is paramount: the Spirit illumines the mind and inclines the heart through the Word preached and read, the sacraments, and the witness of the community. In such contexts, a person may come to believe the gospel directly, without first constructing or surveying complex arguments.

(C1) Therefore, belief in God and in the core claims of Christianity can be properly basic--rational and warranted apart from explicit evidential or argumentative support. + To say such beliefs are "properly basic" is not to say they are groundless or arbitrary. Their ground is the reliable functioning of God‑designed cognitive faculties in the appropriate environment, under the Spirit's work. On this model, arguments and evidence are not the source of warrant but may play a secondary role in articulating, defending, or strengthening beliefs that already enjoy a fundamentally sound epistemic status.

(P3) Arguments and evidence can still play an important, though secondary, role in removing defeaters, clarifying the content of faith, and commending Christian belief in public discourse. + Reformed Epistemology does not forbid apologetic practice. Rather, it relocates it: the function of arguments is primarily to defeat defeaters--objections, counterevidence, or alternative worldviews that appear to undercut Christian belief. In this way, apologetics serves the life of faith without being its ultimate foundation. The ordinary believer can be fully rational even without such arguments, while those trained in philosophy and history offer arguments to serve the church and engage the broader culture.

(C2) Therefore, Reformed Epistemology maintains that the rationality of Christian belief does not depend on traditional proofs or historical arguments, but on the proper functioning of God‑given cognitive faculties under the Spirit's work, with apologetics serving as an auxiliary ministry of clarification and defeater‑removal.

Kelly James Clark, "Reformed Epistemology Apologetics," in Five Views on Apologetics, ed. Steven B. Cowan (Zondervan, 2000).

+ Soft-Classical: If Christian belief is treated as rational merely by appeal to properly basic belief and the Spirit's internal witness, Reformed Epistemology risks functioning only as a theory of "knowing" and not as a full apologetic method of "showing" Christianity to be true through public argument and evidence.

1. Clark intends Reformed Epistemology as an account of knowing, not a replacement for all showing. Clark would agree with Craig that a distinction can be made between the believer's knowing and the apologist's task of showing. His project is to defend the rationality and warrant of Christian belief without presupposing arguments or evidence as its foundation. He does not claim that, therefore, Christians should abandon public argument; rather, he holds that apologetics is not the basis of the believer's knowledge, but a secondary practice that can still have real value. 2. On Clark's view, apologetics can be enriched, not erased, by a Reformed epistemological foundation. Clark would say that if Christian belief is already properly basic and warranted by the Spirit's work, apologists are freed from the burden of making every believer's rationality hang on the persuasiveness of formal arguments. This allows public arguments and historical evidences to be presented as powerful confirmations and clarifications of a faith that is already rationally grounded, rather than as the sole epistemic ground on which faith stands or falls. 3. Craig's emphasis on "showing" can be incorporated as a further layer, not rejected. Clark's framework does not forbid the kind of public case Craig wishes to make; it simply denies that such a case is necessary for the rationality of every believer's faith. From Clark's perspective, there is room for a division of labor: Reformed Epistemology articulates how Christians may know the gospel to be true, while classical-style apologetics, when appropriately chastened, can serve as one way of showing the truth of Christianity in the marketplace of ideas. 4. Reformed Epistemology guards against over-identifying faith with the success of arguments. Clark would also suggest that Craig's concern about "showing" is best met by integrating, not absolutizing, public argument. If the rationality of Christian belief depended entirely on the fortunes of philosophical and historical debates, then ordinary believers could appear to stand on precarious epistemic ground. By situating warrant in the work of the Spirit and properly basic belief, Clark's model allows apologetic argument to be important and commendable, while preventing it from becoming the ultimate ground of Christian rationality.

+ Soft-Classical: In a pluralistic context, adherents of many religions (or even secular outlooks) can claim an inner assurance or basic "seeming" of their own views. Without a strong evidential and argumentative component, Reformed Epistemology appears unable to show why Christian basic beliefs should be preferred over rival basic beliefs that are described in structurally similar terms.

1. The mere existence of rival basic claims does not defeat Christian basic belief. Clark, following Plantinga, would insist that the fact that others make structurally similar claims does not automatically undermine the rationality of Christian belief. If Christianity is in fact true, then the Spirit's work and the believer's properly basic grasp of that truth are not simply one more "seeming" among many, even if they can be described in parallel language. Epistemic symmetry at the level of form does not entail symmetry at the level of warrant. 2. Comparative pluralism is not solved by positing a "neutral" evidential standpoint. Clark would respond that Craig's worry can be raised against any position, including classical apologetics itself. No worldview actually argues from nowhere; all reasoning proceeds from within some set of background commitments. Reformed Epistemology resists the idea that there exists a universally neutral evidential platform from which all religious options can be judged. Instead, it allows for evaluation of rival basic stances through internal critique, coherence, and defeaters, without pretending to step outside all traditions. 3. Defeater-defeaters may include precisely the evidences Craig prefers, but they are not the universal starting point. Clark's model makes room for Christians to have defeater-defeaters for pluralistic challenges--some experiential, some intellectual. These may well include the historical and philosophical arguments Craig emphasizes. What he denies is that such arguments must be the prior foundation of rational belief for all Christians. Rather, they can function as supplementary confirmation and as tools for engagement in contexts where comparative evaluation is pressed. 4. Reformed Epistemology allows apologetics to show superiority without claiming that only evidentially grounded beliefs are rational. In Clark's view, apologetic practice can still highlight the superior coherence, explanatory power, and existential fit of the Christian story over its rivals. Reformed Epistemology simply underlines that even if such comparative case-making is important in some contexts, the rationality of an individual Christian's belief does not depend on first winning that comparative debate. This protects the believer's warrant while still leaving ample space for the kind of evidential showing that Craig wants to pursue.

+ Soft-Classical: Reformed Epistemology, particularly Plantinga's Aquinas/Calvin (A/C) model, misinterprets Calvin's sensus divinitatis. Calvin's sense of divinity was a general awareness of God's existence and majesty, not a specifically Christian knowledge. The proper Scriptural and Reformational ground for Christian assurance is the inner testimony of the Holy Spirit, not an expanded sensus divinitatis.

1. Clark would acknowledge that Plantinga's A/C model extends beyond Calvin's original formulation. Clark is aware that Plantinga's use of the sensus divinitatis is a creative appropriation and extension of Calvin, not a strict historical exegesis. Plantinga himself is clear that he is building a philosophical model inspired by Calvin and Aquinas, not claiming to reproduce their views exactly. Clark would say that the philosophical fruitfulness of the A/C model does not depend on it being a perfect historical match to Calvin's own statements. 2. The inner testimony of the Holy Spirit and the A/C model can be seen as complementary, not competing. Clark would likely respond that the Spirit's inner witness--which Craig rightly emphasizes--can be understood as working through or alongside the cognitive faculties and processes that Plantinga describes in the A/C model. The Spirit does not bypass human cognition but works within it. Thus, the distinction Craig draws may be more a matter of emphasis and terminology than a fundamental conflict. Both accounts affirm that Christian belief is grounded in God's direct work in the believer, not merely in argument or evidence. 3. Reformed Epistemology is flexible enough to accommodate Craig's preferred terminology. Clark would note that if Craig prefers to speak of the "inner testimony of the Holy Spirit" rather than an extended sensus divinitatis, Reformed Epistemology can easily accommodate that preference. The core claim--that Christian belief can be properly basic and warranted by a divine cognitive process--remains intact regardless of whether one uses Calvinian, Plantingan, or more explicitly pneumatological language. The apologetic and epistemological payoff is the same. 4. The historical-exegetical debate does not undermine the philosophical point. Even if Craig is correct that Plantinga's A/C model goes beyond what Calvin himself intended, Clark would argue that this does not defeat the philosophical legitimacy of the model. Philosophical theology often draws on historical sources in creative ways. What matters for apologetics is whether the model provides a coherent, Scripturally defensible, and philosophically robust account of Christian knowledge. Clark would maintain that it does, whether or not every detail maps perfectly onto Calvin's original sensus divinitatis.

+ Evidentialist: By downplaying the necessity of historical evidence and argument, Reformed Epistemology risks neglecting the central public role that the resurrection and other historical events play in the New Testament’s own apologetic.

1. Reformed Epistemology need not deny the importance of historical evidence. Clark does not argue that evidence is unimportant, only that it is not for rational belief. The New Testament’s appeal to the resurrection and other signs can be fully affirmed. The difference is that such appeals are seen as confirmations and public attestations of truths that God can also directly impress upon the heart and mind. 2. The biblical pattern can be interpreted in light of diverse cognitive situations. When Paul appeals to eyewitnesses in 1 Corinthians 15 or to history in Acts, he is addressing particular audiences, some of whom demand signs or wisdom. Reformed Epistemology allows that, in such contexts, presenting evidence is appropriate and even necessary for persuasion. Yet this does not imply that no one could rationally come to faith except by tracing Paul’s or Habermas’s arguments. 3. The Spirit may use historical evidence as part of the process of forming basic belief. On Clark’s model, the line between "evidence" and "basic belief" is not rigidly compartmentalized. The Spirit can use the reading of the Gospels, the preaching of the resurrection, and even formal apologetic arguments as the context in which basic trust in Christ is formed. Once that trust is formed by the Spirit’s work, it can enjoy properly basic status even if the believer later forgets the detailed evidential steps. 4. Recognizing properly basic belief can protect faith from over‑reliance on shifting scholarship. Clark is concerned that if historical arguments are presented as the or basis of rational belief, then changes in scholarly opinion--or the layperson’s inability to follow technical debates--could produce unnecessary crises of faith. By grounding warrant more fundamentally in God’s work through the Spirit, Reformed Epistemology allows historical evidence to retain an important but limited role, thereby safeguarding believers from epistemic dependence on the latest academic trends.

+ Evidentialist: In pastoral and evangelistic contexts, many people’s doubts and objections are precisely about the evidence. If Reformed Epistemology focuses too much on properly basic belief, it may not adequately address those concrete historical and philosophical challenges.

1. Reformed Epistemology is a theory of warrant, not a prohibition on answering doubts. Clark’s primary concern is to explain how Christian belief can be rational even when someone lacks access to sophisticated arguments. This does not mean that such arguments should not be offered where they are needed. Pastors and apologists can fully engage evidential and philosophical questions while still holding that, at a deeper level, the Spirit’s work undergirds faith. 2. Properly basic belief can coexist with serious engagement of defeaters. A believer whose faith is basically grounded in the Spirit’s testimony may nevertheless face intellectual challenges that function as potential defeaters. In such cases, arguments and evidence are precisely the tools by which those defeaters can be removed. Reformed Epistemology gives a framework in which this process can occur without suggesting that faith lacked warrant before the apologetic work was done. 3. Evangelistic strategy can be context‑sensitive. Clark would allow that with some non‑Christians, especially those shaped by modern skepticism, leading with historical or philosophical arguments may be pastorally wise. Reformed Epistemology simply denies that such arguments must be available, and successful, for every rational conversion. God may bring some to faith through direct confrontation with Scripture or through existential crisis, others through extended evidential inquiry; the epistemic model should be flexible enough to account for both. 4. Emphasizing the Spirit’s role can deepen, not shallow, pastoral ministry. By insisting that the Spirit is the primary agent in bringing and sustaining faith, Reformed Epistemology encourages pastors and evangelists to combine apologetic labor with prayer, sacramental life, and proclamation of the Word. Evidence is thereby set within a broader theology of grace, rather than functioning as an almost self‑sufficient engine of conversion.

+ Presuppositionalist: Reformed Epistemology risks abstracting from Scripture’s self‑attesting authority and treating belief in God too generically, instead of rooting rationality explicitly in the triune God revealed in Christ and the Bible.

1. Reformed Epistemology can be, and often is, developed in a thoroughly Christian way. Clark’s version of Reformed Epistemology is not a generic theism. It explicitly appeals to the Reformed doctrine of the Spirit’s testimony through Scripture and the church. Properly basic belief, on this account, includes not only the existence of God, but also central Trinitarian and Christological claims as the Spirit uses the biblical narrative to shape the believer’s mind and heart. 2. The self‑attestation of Scripture fits naturally within a Reformed Epistemological framework. The idea that Scripture is self‑attesting--that it carries its own divine authority--is congenial to the claim that belief in its message can be properly basic. The Spirit’s witness through Scripture is precisely what gives rise to warranted Christian belief. Thus, rather than abstracting from Scripture, Reformed Epistemology can be seen as an attempt to give an epistemological account of Scripture’s self‑authenticating role. 3. Generic theistic reflections can still have a place within a Christian model. While Clark emphasizes the fully Christian shape of basic belief, he does not deny that some people may first come to basic belief in a more general sense of deity before coming to recognize the triune God of Scripture. Reformed Epistemology is flexible enough to acknowledge such psychological trajectories while maintaining that, in the mature Christian, properly basic belief is specifically shaped by the biblical revelation. 4. Presuppositional insights about worldview and lordship can be integrated. Clark can affirm with presuppositionalists that all reasoning takes place under God’s lordship and within a worldview framework. His distinct contribution is to argue that, within that framework, certain beliefs--including belief in God and in Scripture’s message--can have a special epistemic status. Far from ignoring Scripture’s authority, this approach seeks to locate that authority at the very heart of the believer’s noetic structure.

+ Presuppositionalist: By appealing to properly basic belief and the Spirit’s witness, Reformed Epistemology may seem to embrace a kind of circularity that makes its claims immune to critique, undermining the call to bring "every thought captive to Christ" through rigorous argument.

1. Some level of circularity is inevitable in any ultimate epistemic starting point. Clark agrees with presuppositionalists that every system eventually arrives at beliefs that are not justified by appeal to deeper premises. Whether the starting point is sense experience, reason, or Scripture, a kind of "virtuous circularity" is unavoidable. Reformed Epistemology simply makes explicit that, for the Christian, trust in God’s self‑revelation functions at this foundational level. 2. Properly basic belief is not thereby insulated from all critique. Even foundational beliefs can be challenged by internal incoherence, by powerful defeaters, or by the recognition that they lead to explanatory dead ends. Clark’s model allows that a person may come to see that some of what was taken as basic must be re‑examined. What Reformed Epistemology rejects is the idea that such re‑examination must always proceed by appealing to a neutral, non‑theological standpoint. 3. Bringing thoughts captive to Christ includes epistemic humility and openness to correction. On Clark’s view, acknowledging properly basic Christian belief does not license dogmatism or intellectual laziness. Christians are still called to reflect critically on their beliefs, to compare worldviews, and to seek greater understanding. The Spirit can both ground their assurance and lead them into deeper, more coherent grasp of the truth through study and argument. 4. Rigorous argument remains a Christian duty, but not the ground of all warrant. Reformed Epistemology fully endorses the call to love God with the mind and to reason in submission to Christ. It simply maintains that the believer’s rational trust in Christ need not wait upon, or depend entirely upon, the outcome of such reasoning. Arguments are an expression of obedience and love, not the sole basis on which the believer stands before God.

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