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: It is windy if and only if Jessica is a doctor. For all x_10, x_10 will not drive a car. For all x_10, if x_10 were a doctor, then x_10 is driving a car. For all x_10, if x_10 drives a car, then x_10 is a doctor.
If it is windy, then Jessica is a doctor can be inferred via the biconditional elimination rule. If Jessica were a doctor, then it is windy can be inferred via the biconditional elimination rule. For all x_10, x_10 is not a doctor can be inferred via the universal modus tollens rule. For all x_10, x_10 is a doctor if and only if x_10 will drive a car can be inferred via the universal biconditional introduction rule. For all x_10, x_10 will drive a car if and only if x_10 is a doctor can be inferred via the universal biconditional introduction rule.