 However, Rational Reflection has counterintuitive consequences in some cases, such as the “Unmarked Clock” case, introduced in Williamson (2014). Here is that case (based on the presentation in Christensen 2010b; see also Elga 2013; see Horowitz 2014 for a similar case, discussed in connection with epistemic akrasia, and see also Sliwa &amp; Horowitz 2015 for a non-perceptual case with similar features):