What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, x_13 is a doctor. For all x_13, x_13 is rich if and only if x_13 is a poet. For all x_13, if x_13 were an astronaut, then x_13 is rich. There is at least one x_13 for which x_13 is an astronaut or x_13 is a poet.
For all x_13, if x_13 were rich, then x_13 is a poet. For all x_13, if x_13 were a poet, then x_13 is rich.