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 it snows, then John is rich. If it is sunny, then it is snowing. It is sunny or John is not rich.
If it is sunny, then John is rich can be inferred via the transitivity rule. If John were rich, then it is sunny can be inferred via the rewriting rule.