Consider the following premises. S_16(i_4) and w. forall x_16: T(x_16) <-> S_16(x_16). Can we infer T(i_4) from them?
 From forall x_16: T(x_16) <-> S_16(x_16) we can infer T(i_4) <-> S_16(i_4). From T(i_4) <-> S_16(i_4) we can infer S_16(i_4) -> T(i_4). From S_16(i_4) and w we can infer S_16(i_4). Finally, from S_16(i_4) -> T(i_4), S_16(i_4) we can infer T(i_4). Therefore, the answer is yes.