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: For all x_14, x_14 is fast. For all x_14, x_14 is fast if and only if x_14 is bored. There is at least one x_14 for which x_14 is not bored. For all x_14, if x_14 were bored, then x_14 is fast.
Since the premises are contradictory, we can infer anything from them.