What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, if x were sad, then x is making tea. There is at least one x for which x will make tea or x is not a police officer. For all x, x is sad or x is not an astronaut. For all x, x is an astronaut or x is a police officer.
For all x, if x were an astronaut, then x is sad. There is at least one x for which if x were a police officer, then x is making tea.