Inheritance Of Human Consciousness From Intermarriage With Humanoids
No details are available, so every theory has its limitations. The consciousness in the case cited above might have came from the conscious parent.
I commented on both aspects of the theory. You may further ponder upon the problem and come up with a better explanation. A hybrid of human and humanoid can be with ruh or without ruh. If it were without ruh, it was not the subject of the test. Those who were with Ruh made more offspring, then we sometimes have humans without Ruh (mentally retard for example), they, too, are not the subject of the test.