Consider the following premises. q_2 or t_1. q_2 -> ~P(a_16). forall x_16: P(x_16) and S_16(x_16). Can we infer t_1 from them? If possible, name the inference rules being used at each step.
 From forall x_16: P(x_16) and S_16(x_16) we can infer P(a_16) and S_16(a_16) via universal instantiation. From P(a_16) and S_16(a_16) we can infer P(a_16) via simplification. From q_2 -> ~P(a_16), P(a_16) we can infer ~q_2 via modus tollens. Finally, from q_2 or t_1, ~q_2 we can infer t_1 via disjunctive syllogism. Therefore, the answer is yes.