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: It is not raining. Jennifer is taking a plane or it is snowing. It is late if and only if it is raining. If it snows, then it is late. If Jennifer takes a plane, then it is late.
Since the premises are contradictory, we can infer anything from them.