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 is a writer if and only if x_7 will play tennis. If Patricia listens to a song, then Joseph is a writer. Patricia is listening to a song or Joseph is playing tennis.
If Joseph sleeps, then Patricia is listening to a song. For all x_7, if x_7 were a writer, then x_7 is playing tennis. For all x_7, if x_7 plays tennis, then x_7 is a writer.