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_11, if x_11 were rich, then x_11 is playing tennis. For all x_11, x_11 is a lawyer or x_11 is rich. There is at least one x_11 for which if x_11 were curious, then x_11 is not bored. For all x_11, x_11 is a lawyer if and only if x_11 is bored. For all x_11, if x_11 plays tennis, then x_11 is bored.
For all x_11, if x_11 were rich, then x_11 is bored can be inferred via the universal transitivity rule. For all x_11, if x_11 were a lawyer, then x_11 is bored can be inferred via the universal biconditional elimination rule. For all x_11, if x_11 were bored, then x_11 is a lawyer can be inferred via the universal biconditional elimination rule.