Sider (2005) responds that there is still a problem reconciling presentism with time travel conceived in Lewis’s way: that conception of time travel requires that personal time is similar to external time—but presentists have trouble allowing this. Further contributions to the debate whether presentism—and other versions of the A-theory—are compatible with time travel include Monton (2003), Daniels (2012) and Hall (2014) on the side of compatibility, and Miller (2005), Slater (2005), Miller (2008) and Hales (2010) on the side of incompatibility.