What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will not sleep. For all x_9, if x_9 listens to a song, then x_9 is reading a book. For all x_9, if x_9 were a lawyer, then x_9 is listening to a song. There is at least one x_9 for which x_9 will sleep if and only if x_9 will read a book.
For all x_9, if x_9 were a lawyer, then x_9 is reading a book. There is at least one x_9 for which if x_9 sleeps, then x_9 is reading a book. There is at least one x_9 for which if x_9 reads a book, then x_9 is sleeping. There is at least one x_9 for which x_9 will not read a book.