What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, if x_8 reads a book, then x_8 is driving a car. Mary is not driving a car. Mary is reading a book if and only if it is sunny. For all x_8, if x_8 drives a car, then x_8 is reading a book.
If Mary reads a book, then it is sunny. If it is sunny, then Mary is reading a book. For all x_8, x_8 will read a book if and only if x_8 will drive a car. For all x_8, x_8 will drive a car if and only if x_8 will read a book.