 These ideas have given rise to a large literature of responses. To give a sampling: Ghirardi et al. (1979) and Pati (1996) have objected that this Zeno-like model of a quantum measurement runs afoul of other properties of quantum theory, such as the time-energy uncertainty relations, which they argue should prevent the measurements in the supertask sequence above from being made with arbitrarily high frequency. Bokulich (2003) has responded that, nevertheless, such a supertask can still be carried out when the measurement commutes with the unitary evolution, such as when \(E\) is a projection onto an energy eigenstate.