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: Richard is a poet. If Richard cooks, then Richard is a poet. For all x_12, if x_12 were a poet, then x_12 is cooking.
There is at least one x for which x is a poet can be inferred via the existential generalization rule.