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: Michael is making tea if and only if it is sunny. Michael is making tea or it is not sunny.
If it is sunny, then Michael is making tea can be inferred via the rewriting rule. If Michael makes tea, then it is sunny can be inferred via the biconditional elimination rule. If it is sunny, then Michael is making tea can be inferred via the biconditional elimination rule.