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 z_3 for which z_3 will drink water if and only if z_3 will read a book. For all z_3, z_3 is a server if and only if z_3 will read a book.
For all z_3, if z_3 were a server, then z_3 is reading a book. There is at least one z_3 for which if z_3 drinks water, then z_3 is reading a book. For all z_3, if z_3 reads a book, then z_3 is a server. There is at least one z_3 for which if z_3 reads a book, then z_3 is drinking water.