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: There is at least one x_4 for which x_4 will make tea or x_4 is not poor. For all x_4, if x_4 makes tea, then x_4 is poor.
There is at least one x_4 for which if x_4 were poor, then x_4 is making tea can be inferred via the existential rewriting rule.