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: Robert is not bored. Joseph is climbing a mountain if and only if Robert is bored.
If Joseph climbs a mountain, then Robert is bored can be inferred via the biconditional elimination rule. If Robert were bored, then Joseph is climbing a mountain can be inferred via the biconditional elimination rule. Joseph is not climbing a mountain can be inferred via the biconditional elimination rule.