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