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: Richard is a writer if and only if Karen is bored. For all x_17, if x_17 were a poet, then x_17 is a writer. If Karen were bored, then Richard is a poet.
If Richard were a writer, then Karen is bored can be inferred via the biconditional elimination rule. If Karen were bored, then Richard is a writer can be inferred via the biconditional elimination rule.