What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If it is cold, then Linda is a janitor. If Linda were a janitor, then Charles is a nurse. If it is windy, then Linda is reading a book. If Linda reads a book, then it is cold. If Charles were a nurse, then it is windy.
If it is cold, then Charles is a nurse. If Linda were a janitor, then it is windy. If it is windy, then it is cold. If Linda reads a book, then Linda is a janitor. If Charles were a nurse, then Linda is reading a book.