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_4, x_4 will play squash. Patricia is playing squash or John is not taking a plane. If Patricia plays squash, then John is taking a plane.
If John takes a plane, then Patricia is playing squash can be inferred via the rewriting rule.