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: Karen is drinking water if and only if Jennifer is climbing a mountain. For all z_3, z_3 will not drink water.
If Karen drinks water, then Jennifer is climbing a mountain can be inferred via the biconditional elimination rule. If Jennifer climbs a mountain, then Karen is drinking water can be inferred via the biconditional elimination rule.