User blog comment:Ikosarakt1/My Turing machine programs/@comment-25418284-20130330212917/@comment-1605058-20130330223521

I think he meant constructing TMs such complex, that we couldn't cinstruct them by hand. For example, function which needs 500 state machine is a bit hard to program, unless you tell computer to create one based on simple substructures like add, multiply, compare