What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_23, x_23 is not fast. James is playing a game if and only if it is overcast. James is not playing a game. Charles is running if and only if Susan is fast.
If James plays a game, then it is overcast. If Charles goes running, then Susan is fast. If it is overcast, then James is playing a game. If Susan were fast, then Charles is running. It is not overcast.