Online research in philosophy

Evolutionary debunking arguments (EDAs) are arguments that appeal to the evolutionary origins of evaluative beliefs to undermine their justification. This paper aims to clarify the premises and presuppositions of EDAs—a form of argument that is increasingly put to use in normative ethics. I argue that such arguments face serious obstacles. It is often overlooked, for example, that they presuppose the truth of metaethical objectivism. More importantly, even if objectivism is assumed, the use of EDAs in normative ethics is incompatible with a parallel and more sweeping global evolutionary debunking argument that has been discussed in recent metaethics. After examining several ways of responding to this global debunking argument, I end by arguing that even if we could resist it, this would still not rehabilitate the current targeted use of EDAs in normative ethics given that, if EDAs work at all, they will in any case lead to a truly radical revision of our evaluative outlook.

The Principle of Credulity: 'It is basic to human knowledge of the world that we believe things are as they seem to be in the absence of positive evidence to the contrary' [Swinburne 1996: 133]. This underlies the Evidential Problem of Evil, which goes roughly like this: ‘There appears to be a lot of suffering, both animal and human, that does not result in an equal or greater utility. So there's probably some pointless suffering. As God's existence precludes pointless suffering, theism is implausible.’ CORNEA is the principle that observation O raises hypothesis H's probability only if O is more probable given H than it is given not-H. Theists sometimes maintain that apparently pointless suffering is just as likely given theism as atheism (I support this claim by appealing to a Lewisian account of the relevant counterfactuals). Given CORNEA, therefore, what we see of suffering does not make theism unlikely. I maintain that a consequence of so deploying CORNEA is that CORNEA and the Principle of Credulity are incompatible. We are left with a skeptical paradox. CORNEA is a consequence of Bayes’s Theorem, I argue; but it is incompatible with a presupposition of empirical science, namely, that appearances create epistemic warrant, ceteris paribus. External-world probability skepticism follows. I treat the paradox as real. First, I offer an account of how we strike a balance in practice between CORNEA, on the one hand, and the Principle of Credulity and the scientific enterprise on the other. Second, I try to resolve the paradox outright by rejecting the Principle of Credulity and maintaining that the scientific project remains well motivated even allowing probability skepticism. On either response to the paradox, the Evidential Problem of Evil continues to have serious, but defeasible, force against theism.

Could our observations of apparently pointless evil ever justify the conclusion that God does not exist? Not according to Stephen Wykstra, who several years ago announced the “Condition of Reasonable Epistemic Access,” or “CORNEA,” a principle that has sustained critiques of atheistic arguments from evil ever since. Despite numerous criticisms aimed at CORNEA in recent years, the principle continues to be invoked and defended. We raise a new objection: CORNEA is false because it entails intolerable violations of closure.

Could our observations of apparently pointless evil ever justify the conclusion that God does not exist? Not according to Stephen Wykstra, who several years ago announced the “Condition of Reasonable Epistemic Access,” or “CORNEA,” a principle that has sustained critiques of atheistic arguments from evil ever since. Despite numerous criticisms aimed at CORNEA in recent years, the principle continues to be invoked and defended. We raise a new objection: CORNEA is false because it entails intolerable violations of closure.

Graham and Maitzen think my CORNEA principle is in trouble because it entails “intolerable violations of closure under known entailment.” I argue that the trouble arises from current befuddlement about closure itself, and that a distinction drawn by Rudolph Carnap, suitably extended, shows how closure, when properly understood, works in tandem with CORNEA. CORNEA does not obey Closure because it shouldn’t: it applies to “dynamic” epistemic operators, whereas closure principles hold only for “static” ones. What the authors see as an intolerable vice of CORNEA is actually a virtue, helping us see what closure principles should—and shouldn’t—themselves be about.

Graham and Maitzen think my CORNEA principle is in trouble because it entails “intolerable violations of closure under known entailment.” I argue that the trouble arises from current befuddlement about closure itself, and that a distinction drawn by Rudolph Carnap, suitably extended, shows how closure, when properly understood, works in tandem with CORNEA. CORNEA does not obey Closure because it shouldn’t: it applies to “dynamic” epistemic operators, whereas closure principles hold only for “static” ones. What the authors see as an intolerable vice of CORNEA is actually a virtue, helping us see what closure principles should—and shouldn’t—themselves be about.

One of the primary tools in the theist’s defense against “noseeum” arguments from evil is an epistemic principle concerning the Conditions Of ReasoNableEpistemic Access (CORNEA) which places an important restriction on what counts as evidence. However, CORNEA is false because it places too strong acondition on what counts as inductive evidence. If CORNEA is true, we lack evidence for a great many of our inductive beliefs. This is because CORNEA amounts to a sensitivity constraint on evidence, and inductive evidence is often insensitive. So unless a theist is also an inductive skeptic, she must abandon CORNEA in responding to this sort of argument from evil.