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: James is a server if and only if it is windy. If William were a janitor, then James is a server.
If James were a server, then it is windy can be inferred via the biconditional elimination rule. If it is windy, then James is a server can be inferred via the biconditional elimination rule.