It is not hard to think of similar philosophical cases. The worth of philosophical thought-experiments does not always require that the intuitions they elicit are sound. Consider the classic Lockean set-up where someone’s memories are transferred to a new body. We all have an intuition that the person goes with the memories, not the old body, as evidenced by our reactions to the many fictions which trade on just this kind of scenario. But few philosophers of personal identity would nowadays hold that this intuition is decisive in favour of Lockeanism. Again, consider the intuition that conscious properties are ontologically distinct from physical ones, as displayed in our immediate reaction to zombie scenarios. Here too, few would suppose that these intuitions by themselves decide the case. Still, even those who reject Lockeanism and dualism will allow that reflection on memory-switching and zombie cases has played a crucial role in clarifying what is at issue in the debates. The evocation of intuitions by philosophical thought experiments is important, not because they provide some special kind of a priori evidence, but simply because they need to be made explicit and assessed against the overall a posteriori evidence.[16]