Consider the following premises. forall x_6: ~P_6(x_6). forall x_6: P_6(x_6). forall x_6: S_2(x_6). Can we infer exists x_6: ~S_2(x_6) from them? If possible, name the inference rules being used at each step.
The premises are contradictory and we can infer anything from them. Therefore, the answer is yes.