What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: If Jessica drives a car, then Mary is reading a book. Jessica is sleeping if and only if Mary is reading a book. For all x_17, if x_17 sleeps, then x_17 is driving a car.
If Jessica sleeps, then Mary is reading a book can be inferred via the biconditional elimination rule. If Mary reads a book, then Jessica is sleeping can be inferred via the biconditional elimination rule.