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: For all z, z is a server. If Linda were a server, then Michael is a police officer. Jessica is a carpenter if and only if Michael is a police officer. If Michael were a police officer, then it is sunny.
If Linda were a server, then it is sunny can be inferred via the transitivity rule. If Jessica were a carpenter, then Michael is a police officer can be inferred via the biconditional elimination rule. If Michael were a police officer, then Jessica is a carpenter can be inferred via the biconditional elimination rule.