What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is not late. James is rich. It is late if and only if Mary is reading a book. Mary is reading a book or James is bored.
It is not late and James is rich. James is rich and it is not late. If it is late, then Mary is reading a book. If Mary reads a book, then it is late. Mary is not reading a book.