"Now, our tutor pointed out that there was a weakness in the hard-line or extreme solipsist’s position which came down to the question why, if they were all that existed, they bothered to deceive themselves so? Why did it appear to the solipsistic entity that there was an external reality in the first place, and, more to the point, why this one specifically? Why did the solipsist appear to be constrained in any way by that supposedly physically non-existent and therefore utterly pliable reality?"