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: Jennifer is not climbing a mountain. Jessica is a politician if and only if Jennifer is climbing a mountain. Jessica is a politician or Jennifer is not climbing a mountain.
If Jennifer climbs a mountain, then Jessica is a politician can be inferred via the rewriting rule. If Jessica were a politician, then Jennifer is climbing a mountain can be inferred via the biconditional elimination rule. If Jennifer climbs a mountain, then Jessica is a politician can be inferred via the biconditional elimination rule. Jessica is not a politician can be inferred via the biconditional elimination rule.