 Others who accept the idea that the problem with Dutch Book vulnerability is not that it leads to bad consequences, but that it signals an internal defect in the agent’s credences, simply say that DBAs that meet certain conditions, including being constructible by a bookie without requiring more than knowledge of the agent’s credences, establish that the credences leading to a Dutch Book under these conditions display a form of irrationality, without suggesting that Dutch Book vulnerability is form of inconsistency. Both ways of understanding DBAs have been carried over to arguments in support of additional probabilistic norms. 