What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z_1, z_1 will cook if and only if z_1 is a poet. For all z_1, if z_1 takes a plane, then z_1 is a poet. For all z_1, if z_1 cooks, then z_1 is taking a plane.
For all z_1, if z_1 cooks, then z_1 is a poet. For all z_1, if z_1 cooks, then z_1 is a poet. For all z_1, if z_1 were a poet, then z_1 is cooking.