  The viability of the Retentional approach by no means entirely depends on the content/vehicle distinction, but Retentionalists can and do appeal to it when trying to overcome resistance to the very idea that change and succession can reside in momentary episodes of experiencing. It is worth noting that in this instance there is an unusually close correspondence between the relevant content- and vehicle-properties. In the case of a Retentional specious present, the relevant contents represent succession, but they do so by appearing as a succession (rather than by carrying an inscription ‘this is a succession’). Does this mean the vehicle must itself be temporally extended, so as to be able to include the apprehended succession? Not necessarily, for Retentional theorists can insist that we need to distinguish between succession as a purely phenomenal feature – i.e., a property of conscious mental states or representations – and succession as a property of physical events in the wider world. This move made, Retentional theorists can go on to argue that there is no reason to think that phenomenal successions (and similarly for other temporal properties) cannot reside within episodes of experiencing that are themselves momentary. While this may well be true, it now looks very much as though it is the phenomenal/physical distinction that is doing the real work, rather than the content/vehicle distinction.