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_9, x_9 will go running and x_9 is a politician. For all x_9, if x_9 were a mechanic, then x_9 is taking a plane. For all x_9, x_9 will read a book or x_9 is a mechanic. For all x_9, if x_9 reads a book, then x_9 is taking a plane.
For all x_9, x_9 will go running can be inferred via the universal simplification rule. For all x_9, x_9 is a politician can be inferred via the universal simplification rule. For all x_9, x_9 will take a plane can be inferred via the universal disjunction elimination rule.