What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, x_7 will cook. For all x_7, if x_7 were a taxi driver, then x_7 is not rich. For all x_7, x_7 will cook if and only if x_7 is rich.
For all x_7, if x_7 cooks, then x_7 is rich. For all x_7, if x_7 were rich, then x_7 is cooking.