"There is an inconsistency between the alleged non-causability of the past, the transfer of non-causability principle, and the supposition that a proposition about the past entails a proposition about the future."
"There is a temporal asymmetry in causability because everything causable is in the future."
"But these three categories show that the logical categories of causability and non-causability do not correspond to the standard modal categories of the necessary, possible, and impossible."