Although the technology has improved, our ability to influence patterns in people such as our subject are still quite limited. The only operation that can be reliably successful is one of "Reconstruction". In effect, restoring the pattern to a state based on one of the known archetypes. Although descendants do not have enough essential influence to affect them noticeably, there still exists enough data to reliably reconstruct the pattern-state of their closest hybrid ancestor. This creates significant difficulties if there are enough and varied ancestors to "muddy the waters" so to speak, if there's a clear single pattern, well... We can see the results in our subject.