 The accounts we considered above, first of the temporal restrictions on our experience, and secondly of our experience of time order, did not explicitly appeal to tensed, or A-theoretic notions. The facts we did appeal to look like purely B-theoretic ones: that causes are always earlier than their effects, that things typically change slowly in relation to the speed of transmission of light and sound, that our information-processing capacities are limited, and that there can be causal connections between memories and experiences. So it may be that the tenseless theorist can discharge the obligation to explain why time seems to pass. But two doubts remain. First, perhaps the A- theorist can produce a simpler explanation of our experience. Second, it may turn out that supposedly B-series facts are dependent upon A-series ones, so that, for example, a and b are simultaneous by virtue of the fact that both are present.