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: If Susan were a doctor, then Patricia is not poor. Richard is playing tennis or Patricia is making tea. For all y_4, if y_4 makes tea, then y_4 is poor. If Richard plays tennis, then Patricia is poor.
If Patricia goes running, then Richard is playing tennis can be inferred via the rewriting rule.