 While the Rule of Conditionalization is generally presented as demanding that agents satisfy invariance for each proposition, and various authors have rightly complained that this demands an unreasonable rigidity of belief (Bacchus, Kyburg, and Thalos 1990; Levi 2002), Jeffrey does not treat the condition as a strict requirement on rational belief change (Jeffrey 2004). He leaves open the possibility that when probabilities are shifted over a partition, the conditional probabilities could change, although this leaves the unanswered question as to when invariance is reasonable to assume. In any case, as with the Simple Rule of Conditionalization, the Dutch Strategy argument here tells in the same way against planned violations of invariance.  