 This theory has, in Broad’s opinion, various advantages. One advantage mentioned is that it seems to avoid the difficulties with the rate of times passage—difficulties which besets the Moving Spotlight Theory, but arguably also the Growing Block Theory. The proposed theory also avoids presupposing that “what has not yet supervened and what has already been superseded in some sense ‘co-exist’ with each other and with what is now occurring,” which he views as a defect of the Moving Spotlight Theory. More interestingly, it avoids what Broad now regards as a defect of the Growing Block Theory, viz. that of presupposing “that phases, which have already supervened and been superseded, in some sense ‘co-exist’ with each other and with that which is now happening” (1959, p. 767).