What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, x_6 is rich or x_6 will sleep. For all x_6, x_6 is not rich. For all x_6, if x_6 were a doctor, then x_6 is not sleeping. There is at least one x_6 for which x_6 is a doctor or x_6 will climb a mountain.
For all x_6, x_6 will sleep.