Moral Skepticism - Forms of Moral Skepticism

Forms of Moral Skepticism

Moral skepticism divides into three subclasses: moral error theory (or moral nihilism), epistemological moral skepticism, and noncognitivism. All three of these theories share the same conclusions, which are:

(a) we are never justified in believing that moral claims (claims of the form "state of affairs x is good," "action y is morally obligatory," etc.) are true and, even more so

(b) we never know that any moral claim is true.

However, each "gets" to (a) and (b) by different routes.

Moral error theory holds that we do not know that any moral claim is true because

(i) all moral claims are false,

(ii) we have reason to believe that all moral claims are false, and so, because

(iii) we are not justified in believing any claim we have reason to deny, we are therefore not justified in believing any moral claims.

Epistemological moral skepticism is a subclass of theory, the members of which include Pyrrhonian moral skepticism and dogmatic moral skepticism. All members of epistemological moral skepticism share two things in common: first they acknowledge that we are unjustified in believing any moral claim, and second, they are agnostic on whether (i) is true (i.e. on whether all moral claims are false).

• Pyrrhonian moral skepticism holds that the reason we are unjustified in believing any moral claim is that it is irrational for us to believe either that any moral claim is true or that any moral claim is false. Thus, in addition to being agnostic on whether (i) is true, Pyrrhonian moral skepticism denies (ii).
• Dogmatic moral skepticism, on the other hand, affirms (ii) and cites (ii)'s truth as the reason we are unjustified in believing any moral claim.

Finally, Noncognitivism holds that we can never know that any moral claim is true because moral claims are incapable of being true or false (they are not truth-apt). Instead, moral claims are imperatives (e.g. "Don't steal babies!"), expressions of emotion (e.g. "stealing babies: Boo!"), or expressions of "pro-attitudes" ("I do not believe that babies should be stolen.")