YES
O(n^2)
TRS:
 {
               zeros() -> cons(0(), n__zeros()),
               zeros() -> n__zeros(),
           activate(X) -> X,
  activate(n__zeros()) -> zeros(),
     tail(cons(X, XS)) -> activate(XS)
 }
 Natural interpretation:
  Strict:
   {
                 zeros() -> cons(0(), n__zeros()),
                 zeros() -> n__zeros(),
             activate(X) -> X,
    activate(n__zeros()) -> zeros(),
       tail(cons(X, XS)) -> activate(XS)
   }
  Weak:
   {}
  Interpretation class: deltarestricted
  [tail](delta, X0) = + 1*X0 + 2 + 0*X0*delta + 3*delta
  [activate](delta, X0) = + 1*X0 + 2 + 0*X0*delta + 2*delta
  [zeros](delta) = + 0 + 1*delta
  [n__zeros](delta) = + 0 + 0*delta
  [0](delta) = + 0 + 0*delta
  [cons](delta, X1, X0) = + 1*X0 + 0*X1 + 0 + 0*X0*delta + 1*X1*delta + 0*delta
  tail_tau_1(delta) = delta/(1 + 0 * delta)
  activate_tau_1(delta) = delta/(1 + 0 * delta)
  
  
  
  cons_tau_1(delta) = delta/(0 + 1 * delta)cons_tau_2(delta) = delta/(1 + 0 * delta)
  
  Qed