What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: William is playing tennis or Linda is not listening to a song. Linda is listening to a song if and only if it is overcast.
If Linda listens to a song, then William is playing tennis can be inferred via the rewriting rule. If Linda listens to a song, then it is overcast can be inferred via the biconditional elimination rule. If it is overcast, then Linda is listening to a song can be inferred via the biconditional elimination rule.