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: For all x_17, x_17 is bored or x_17 is a cashier. If Karen were a cashier, then it is cold. It is cold if and only if Karen is bored.
If it is cold, then Karen is bored can be inferred via the biconditional elimination rule. If Karen were bored, then it is cold can be inferred via the biconditional elimination rule.