What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_2, if x_2 were a police officer, then x_2 is bored. David is a police officer or Thomas is not a doctor. If David were bored, then Thomas is a doctor.
If Thomas were a doctor, then David is a police officer can be inferred via the rewriting rule.