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