You fools! 3D printed skulls means the end of the infallibility of phrenology as a detector of thought crimes in an individual before they are acted upon, or perhaps before too long even as a reliable measure of the inferiority of the lesser races.

Fortunately there are so many rich new fields of neurobollocks that rigorous scientific measurement of Alimentiveness, Concentrativeness, Philoprogenitiveness, etc. is still possible, if more expensive. Despite occasional setbacks, scientism marches onwards to it's inevitable triumph over reality.