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: If Jennifer were a writer, then it is snowing. If it snows, then Barbara is a cashier. If Barbara were a cashier, then Jennifer is a writer.
If Jennifer were a writer, then Barbara is a cashier can be inferred via the transitivity rule. If it snows, then Jennifer is a writer can be inferred via the transitivity rule. If Barbara were a cashier, then it is snowing can be inferred via the transitivity rule.