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: There is at least one x_16 for which if x_16 drives a car, then x_16 is a scientist. For all x_16, if x_16 were a scientist, then x_16 is driving a car. For all x_16, x_16 is a scientist.
For all x_16, x_16 will drive a car can be inferred via the universal modus ponens rule. There is at least one x_16 for which x_16 will drive a car if and only if x_16 is a scientist can be inferred via the existential biconditional introduction rule. There is at least one x_16 for which x_16 is a scientist if and only if x_16 will drive a car can be inferred via the existential biconditional introduction rule.