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_6, x_6 is bored or x_6 will not take a plane. For all x_6, x_6 will take a plane. There is at least one x_6 for which if x_6 were bored, then x_6 is playing squash.
For all x_6, if x_6 takes a plane, then x_6 is bored can be inferred via the universal rewriting rule.