The point is that we are all capable of believing things which we
know to be untrue, and then, when we are finally proved wrong,
impudently twisting the facts so as to show that we were right.
Intellectually, it is possible to carry on this process for an
indefinite time: the only check on it is that sooner or later a
false belief bumps up against solid reality, usually on a
Apt, as ever.