What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, if z were a nurse, then z is making tea. For all z, if z makes tea, then z is playing squash. For all z, if z plays squash, then z is a nurse.
For all z, if z were a nurse, then z is playing squash. For all z, if z makes tea, then z is a nurse. For all z, if z plays squash, then z is making tea.