>>/71323/
You fail at reading comprehension.
The point was that incest make defect more likely because it causes recessive genes to be more likely to get expressed as traits.
Recessive traits are more likely to code for deleterious phenotypes because they are less exposed to selective pressures due to not being expressed as often.
And, children born to high-cosanguinious inbreeding merely have a greater chance of manifesting a defective phenotype, because its not a certainty that they will inherit the recessive genes from both their parents.
Hence, in a society where brothers and sisters fuck a lot and make many children AND where eugenic purging is practiced, the defective offspring will be culled and the inbred children who lack defects will also be more likely to lack the recessive genes for those deleterious traits.
And over successive generations of brother-sister incest and the removal of inbreds who manifest any defective phenotypes, over time the bloodline will be strengthened to the point where the chances of producing a retarded child from a brother and sister smashing are as likely as having such a child from two wholly unrealted lovers making love and getting a pregnancy from it.
What the real issue is, is retarded babies being enabled to survive, we need eugenics, we require that all defective humans who fail to meet some selective standard not have resources wasted on them, and indeed that they be purged from continued life.
The problem of sister loving is not that it makes retards, but that we as a society keep our retards alive.
Also, we have an problem with women over 40 having retarded children, the biggest source of autists and downies are women giving birth in middle age.