Kammersängerköpfe (heads of singers at the opera) are adaptive.
Originally they should become kings. But the kingmaker Seeger rejected them because of external faults. Therefore they ended up at the dissecting table of my lab.
It became apparent that they were also faulty inside.
They had no brain.
The former shallow-brained kings left the OR being finally talented Kammersänger (singers).
Stefan Seeger, Solingen