Consider the following premises. forall y: T_4(y) -> W(y). forall y: T_4(y) or ~T_1(y). forall y: W(y) -> T_1(y). exists y: ~T_4(y). Can we infer forall y: T_4(y) or ~T_1(y) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.