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_5, if x_5 plays squash, then x_5 is a politician. James is a doctor or Linda is playing squash. If James were a doctor, then Linda is a politician.
If Linda were poor, then James is a doctor can be inferred via the rewriting rule.