Consider the following premises. R_14(a_14) <-> q. t_1. forall x_14: ~R_14(x_14). Can we infer t_1 and ~q from them? If possible, name the inference rules being used at each step.
 From forall x_14: ~R_14(x_14) we can infer ~R_14(a_14) via universal instantiation. From R_14(a_14) <-> q, ~R_14(a_14) we can infer ~q via biconditional elimination. Finally, from t_1, ~q we can infer t_1 and ~q via conjunction. Therefore, the answer is yes.