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: Linda is not poor. If it is cloudy, then it is overcast. It is overcast if and only if Linda is poor.
If it is overcast, then Linda is poor can be inferred via the biconditional elimination rule. If Linda were poor, then it is overcast can be inferred via the biconditional elimination rule. It is not overcast can be inferred via the biconditional elimination rule.