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 x_6, if x_6 drives a car, then x_6 is making tea. There is at least one x_6 for which if x_6 makes tea, then x_6 is driving a car. For all x_6, x_6 will drive a car.
For all x_6, x_6 will make tea can be inferred via the universal modus ponens rule. There is at least one x_6 for which x_6 will make tea if and only if x_6 will drive a car can be inferred via the existential biconditional introduction rule. There is at least one x_6 for which x_6 will drive a car if and only if x_6 will make tea can be inferred via the existential biconditional introduction rule.