What I said is a widely documented fact. Frank doesn't actually contradict it except in the sense that he doesn't consider that historical cases of muti-generational inbreeding contributed to the taboo around first cousin marriage. Since I've seen multiple claims of this that I consider reliable I would need to see some counter-evidence of that, anthropologist or not.
Frank is an anthropologist and he literally said that's not the case, so I'm not sure why you're saying this? It is more of a "vibe" thing?
What I said is a widely documented fact. Frank doesn't actually contradict it except in the sense that he doesn't consider that historical cases of muti-generational inbreeding contributed to the taboo around first cousin marriage. Since I've seen multiple claims of this that I consider reliable I would need to see some counter-evidence of that, anthropologist or not.
It may be widely documented in the sense that it's basically bad information that remains hegemonic.