What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one y for which y will cook if and only if y will drink water. For all y, y is a writer if and only if y will cook. For all y, if y drinks water, then y is a writer.
For all y, if y were a writer, then y is cooking. There is at least one y for which if y cooks, then y is drinking water. For all y, if y cooks, then y is a writer. There is at least one y for which if y drinks water, then y is cooking.