What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_1, y_1 will cook or y_1 will not take a plane. There is at least one y_1 for which y_1 will take a plane or y_1 will not cook.
For all y_1, if y_1 takes a plane, then y_1 is cooking. There is at least one y_1 for which if y_1 cooks, then y_1 is taking a plane.