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 it is raining. It is not sunny or it is snowing. It is sunny or it is overcast. If it snows, then Jennifer is happy. If it rains, then Jennifer is happy.
If it is overcast, then Jennifer is happy can be inferred via the transitivity rule. It is overcast or it is snowing can be inferred via the resolution rule.