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_11, x_11 will drive a car if and only if x_11 will read a book. For all x_11, x_11 will not drive a car. For all x_11, if x_11 were poor, then x_11 is a soldier. For all x_11, if x_11 climbs a mountain, then x_11 is poor. For all x_11, x_11 is a soldier if and only if x_11 will read a book.
For all x_11, if x_11 climbs a mountain, then x_11 is a soldier can be inferred via the universal transitivity rule. For all x_11, if x_11 drives a car, then x_11 is reading a book can be inferred via the universal biconditional elimination rule. For all x_11, if x_11 were a soldier, then x_11 is reading a book can be inferred via the universal biconditional elimination rule. For all x_11, if x_11 reads a book, then x_11 is driving a car can be inferred via the universal biconditional elimination rule. For all x_11, if x_11 reads a book, then x_11 is a soldier can be inferred via the universal biconditional elimination rule. For all x_11, x_11 will not read a book can be inferred via the universal biconditional elimination rule.