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 driving a car. If Jennifer drives a car, then John is a server. It is cloudy if and only if John is a server.
John is a server can be inferred via the modus ponens rule. If it is cloudy, then John is a server can be inferred via the biconditional elimination rule. If John were a server, then it is cloudy can be inferred via the biconditional elimination rule.