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 is rich or y will write a letter. For all y, y will not drink water. For all y, y is not rich or y is a server. For all y, if y writes a letter, then y is drinking water.
For all y, y will not write a letter. There is at least one y for which y will write a letter or y is a server.