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_7, if x_7 were poor, then x_7 is driving a car. For all x_7, x_7 will not drive a car. For all x_7, if x_7 drives a car, then x_7 is poor. For all x_7, x_7 is bored or x_7 is poor. For all x_7, x_7 is not bored or x_7 will sleep.
For all x_7, x_7 is not poor can be inferred via the universal modus tollens rule. For all x_7, x_7 is poor or x_7 will sleep can be inferred via the universal resolution rule. For all x_7, x_7 is poor if and only if x_7 will drive a car can be inferred via the universal biconditional introduction rule. For all x_7, x_7 will drive a car if and only if x_7 is poor can be inferred via the universal biconditional introduction rule.