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: David is not a doctor or it is snowing. If it snows, then David is making tea. David is a doctor or it is overcast. David is making tea or it is not overcast.
It is overcast or it is snowing can be inferred via the resolution rule. If it is overcast, then David is making tea can be inferred via the rewriting rule.