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: Thomas is rich or James is not a police officer. If Thomas were rich, then James is a police officer. James is a police officer if and only if Thomas is rich.
If James were a police officer, then Thomas is rich can be inferred via the rewriting rule. If James were a police officer, then Thomas is rich can be inferred via the biconditional elimination rule. If Thomas were rich, then James is a police officer can be inferred via the biconditional elimination rule.