What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 will cook if and only if x_12 will read a book. It is windy if and only if it is cold. It is cold if and only if David is reading a book. David is not cooking.
If it is windy, then it is cold. If it is cold, then David is reading a book. If it is cold, then it is windy. If David reads a book, then it is cold. For all x_12, if x_12 cooks, then x_12 is reading a book. For all x_12, if x_12 reads a book, then x_12 is cooking.