You have this reversed. The fact that nobody can attack Apple IS the proof that Apple is a monopoly. Looking at a similar example, it took a lot for Vanderbil

You have this reversed. The fact that nobody can attack Apple IS the proof that Apple is a monopoly. Looking at a similar example, it took a lot for Vanderbilt to build and buy up all the railroads. Once that was done, however, the system was locked in place and nobody could dethrone him.