 Formal epistemologists have long been interested in different “scoring rules”—functions that measure the accuracy or inaccuracy of degrees of belief (hereafter, credences). For example, one widely discussed scoring rule is the Brier score (Brier 1950). Let \(C(p)\) be an agent’s credence in \(p\); let \(T(p)\) be \(p\)’s indicator function, which equals 1 if \(p\) is true, and 0 if \(p\) is false. \(C(p)\)’s Brier score is calculated by the formula: