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_7, x_7 is curious or x_7 will work. For all x_7, x_7 is not bored. For all x_7, x_7 is curious if and only if x_7 is bored.
For all x_7, if x_7 were curious, then x_7 is bored can be inferred via the universal biconditional elimination rule. For all x_7, if x_7 were bored, then x_7 is curious can be inferred via the universal biconditional elimination rule. For all x_7, x_7 is not curious can be inferred via the universal biconditional elimination rule.