 Objection 2: Using the Brier score to measure inaccuracy has unintuitive consequences. A further objection to Leitgeb and Pettigrew’s characterization of inaccuracy measures is given by Levinstein (2012). In the sequel to the paper in which they give this characterization, Leitgeb and Pettigrew use it to argue in favour of an updating rule for credences that applies in the same situations as so-called Jeffrey Conditionalization (or Probability Kinematics) but offers different advice (Jeffrey 1965; Leitgeb &amp; Pettigrew 2010b). Levinstein objects to the use of the Brier score to measure inaccuracy on the grounds that this alternative updating rule gives deeply unintuitive results.