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 drives a car, then x is playing squash. For all x, x will sleep or x will drive a car. For all x, if x sleeps, then x is poor. For all x, if x plays squash, then x is poor.
For all x, if x drives a car, then x is poor.