 In Real People: Personal Identity Without Thought Experiments (1988), Kathleen Wilkes takes aim at the proliferation of thought experiments in the personal identity literature. It is clear that Wilkes has the elaborate thought experiments that Parfit employs (including teletransportation, split brain cases, etc.) in mind throughout her critique. But, it is also clear that Wilkes traces this methodology back to Locke. Of this she says, 