Abstract

This paper examines the epistemic tension between -credence that tracks the weight of confirmation and disconfirmation-and the toward belief frequently valorized in biblical faith. Building on ), I argue that core rationality requires credences to adjust with the evidential , rising or falling in proportion to the balance of support. Rationality thus demands of epistemic attitudes, not a binary toggle. By contrast, binary commitment treats doubt as a defect rather than a rational recalibration, promoting rigidity that predictably undermines truth-tracking. The conclusion is that biblical faith, so construed, conflicts with evidence-responsive rationality and is epistemically inferior to models that enforce alignment between confidence and evidence (Dutant, Belief is rational only when confidence is proportionate to the balance of available evidence; biblical faith, construed as binary and unwavering, conflicts with that core rationality. This thesis entails a gradient epistemology, on which rational credences rise or fall smoothly with the evidential balance rather than snapping into all-or-nothing On evidentialism, a doxastic state is justified only insofar as it conforms to one's ). In quantitative terms, this demands calibrated credences rather than categorical attitudes: if the evidential support is about 0 . Formal epistemology explains why: credences that violate probability axioms misrepresent the evidential constraints and enable sure-loss patterns in decision and inference (Christensen, The key image is that of a , like a dimmer switch or thermometer, that rises or falls with the balance of reasons. A thermostat analogy illustrates this: as ambient conditions shift, a thermostat adjusts incrementally; so too must rational credence adjust with the evidential state. Bayesianism codifies this through conditionalization, updating priors to posteriors when new information arrives (Greaves & Wallace, ). This is not optional finesse but the unique updating rule that maximizes expected epistemic utility (Greaves & Wallace, By contrast, the biblical ideal of faith is often framed not as graded credence but as a binary switch whose virtue is immovability. Doubt.