What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_2 for which if x_2 listens to a song, then x_2 is reading a book. For all x_2, if x_2 reads a book, then x_2 is not writing a letter. For all x_2, x_2 will write a letter.
For all x_2, x_2 will not read a book.