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: It is cold. If it is late, then Jennifer is bored. Barbara is not playing tennis. If Jennifer were bored, then Barbara is playing tennis.
Jennifer is not bored can be inferred via the modus tollens rule. If it is late, then Barbara is playing tennis can be inferred via the transitivity rule. It is cold and Barbara is not playing tennis can be inferred via the conjunction rule. Barbara is not playing tennis and it is cold can be inferred via the conjunction rule.