> Seems like the sibling network they discuss where people can become aware of who's related to them would solve that problem. I'll also mention that such a si

> Seems like the sibling network they discuss where people can become aware of who's related to them would solve that problem. I'll also mention that such a sibling network can actually cause the problem. https://au.news.yahoo.com/half-siblings-with-two-children-together-fighting-for-right-to-marry-000207408.html https://au.news.yahoo.com/half-siblings-with-two-children-to... > After tracking down her half-brother on Facebook, Ms Parra eventually met Mr Parra and the pair felt attracted to one another. "We didn't want to realise it, we were angry with ourselves because it was hard to admit and break that taboo: we are siblings even though we didn't feel that way." > After just a few days, the half-siblings felt they couldn't carry on without seeing each other again. "Imagine liking a girl and, for a moral reason, being forbidden to be with her. It's really hard to deal with," Mr Parra declared.