What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, if y reads a book, then y is working. For all y, y is a doctor if and only if y will work. There is at least one y for which y will read a book if and only if y is a doctor.
For all y, if y were a doctor, then y is working. There is at least one y for which if y reads a book, then y is a doctor. For all y, if y works, then y is a doctor. There is at least one y for which if y were a doctor, then y is reading a book.