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: James is not playing squash. James is playing squash if and only if Susan is climbing a mountain. If Michael doesn't go running, then it is windy. Susan is climbing a mountain if and only if Michael is running.
If James plays squash, then Susan is climbing a mountain can be inferred via the biconditional elimination rule. If Susan climbs a mountain, then Michael is running can be inferred via the biconditional elimination rule. If Susan climbs a mountain, then James is playing squash can be inferred via the biconditional elimination rule. If Michael goes running, then Susan is climbing a mountain can be inferred via the biconditional elimination rule. Susan is not climbing a mountain can be inferred via the biconditional elimination rule.