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, if x_7 were a taxi driver, then x_7 is a bartender. For all x_7, x_7 is a bartender if and only if x_7 is a poet. For all x_7, x_7 is not a sailor or x_7 is a poet. There is at least one x_7 for which x_7 is a sailor or x_7 is a taxi driver.
There is at least one x_7 for which x_7 is a taxi driver or x_7 is a poet. For all x_7, if x_7 were a bartender, then x_7 is a poet. For all x_7, if x_7 were a poet, then x_7 is a bartender.