What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_1, y_1 is a poet or y_1 is not a musician. For all y_1, if y_1 were a poet, then y_1 is a musician.
For all y_1, if y_1 were a musician, then y_1 is a poet.