 Not everyone is impressed by Frankfurt’s proposed counterexamples and the FSCs he inspired. Some critics concede that PAP is false, but insist that some neighboring principle—one that will serve many of the same purposes as PAP—is immune to Frankfurt’s examples. Others attack FSCs directly, arguing that the examples fail to show even that PAP is false. The critical literature is too large to cover in detail here, but this section outlines a few broad themes. (Among the many useful surveys are Fischer 1999, 2011; Sartorio 2017; and the pertinent chapters of Beebee 2013; Griffith 2013; Timpe 2013.)