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 not playing squash. If Jennifer were bored, then William is playing squash. Robert is sleeping or Linda is a scientist. If Linda were a scientist, then Thomas is running. If Robert sleeps, then Thomas is running.
Jennifer is not bored can be inferred via the modus tollens rule. Thomas is running can be inferred via the disjunction elimination rule.