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: Jessica is not bored. Jessica is bored if and only if Richard is a mechanic. If Jessica were bored, then Richard is a mechanic. James is a police officer.
Jessica is not bored and James is a police officer can be inferred via the conjunction rule. James is a police officer and Jessica is not bored can be inferred via the conjunction rule. If Jessica were bored, then Richard is a mechanic can be inferred via the biconditional elimination rule. If Richard were a mechanic, then Jessica is bored can be inferred via the biconditional elimination rule. Richard is not a mechanic can be inferred via the biconditional elimination rule.