Consider the following premises. q. forall x_17: S(x_17) <-> S_17(x_17). t <-> S_17(b_2). S(b_2) -> ~q. Can we infer t from them? If possible, name the inference rules being used at each step.
 From forall x_17: S(x_17) <-> S_17(x_17) we can infer S(b_2) <-> S_17(b_2) via universal instantiation. From S(b_2) -> ~q, q we can infer ~S(b_2) via modus tollens. From S(b_2) <-> S_17(b_2) we can infer S_17(b_2) -> S(b_2) via biconditional elimination. From S_17(b_2) -> S(b_2), ~S(b_2) we can infer ~S_17(b_2) via modus tollens. Finally, from t <-> S_17(b_2), ~S_17(b_2) we can infer ~t via biconditional elimination, which contradicts t. Therefore, the answer is no.