Consider the following premises. forall x_15: T(x_15) or ~R(x_15). exists x_15: P_15(x_15) -> T(x_15). forall x_15: P_15(x_15) <-> T(x_15). Can we infer exists x_15: P_15(x_15) -> T(x_15) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.