 Below is an outline of the universal Turing machine indicating how these basic functions indeed make possible universal computation. It is assumed that upon initialization, U has on its tape the S.D. of some Turing machine \(T_n\). Remember that Turing uses the system of alternating F and E-squares and so, for instance, the S.D. of \(T_{\textrm{Simple}}\) will be written on the tape of U as: 