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 is overcast, then Karen is a scientist. If Karen were a scientist, then Mary is a police officer. If Mary were a police officer, then Michael is a musician.
If it is overcast, then Mary is a police officer can be inferred via the transitivity rule. If Karen were a scientist, then Michael is a musician can be inferred via the transitivity rule.