What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, if x_3 reads a book, then x_3 is a writer. Jennifer is not a writer. For all x_3, if x_3 were a writer, then x_3 is reading a book.
For all x_3, x_3 will read a book if and only if x_3 is a writer. For all x_3, x_3 is a writer if and only if x_3 will read a book.