Edwird -> RE: Twitter being Left Wing Nazis (11/19/2016 4:52:07 PM)
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ORIGINAL: MrRodgers Well speaking of cousins and to put a fine point on them and first cousins in particular...this is funny. HERE Okay, I wasn't going to get into fractional siblings, but you've pushed me too far. For one thing, the mental floss guy forgot to mention England's Mary I and her marriage to first cousin, once removed, then-prince Phillip, future king Phillip II of Spain. Mistakes happen, I forgive, etc. But ... Half siblings have one parent in common, if the other parent being biologically/genetically unrelated. If the uncommon parents are siblings then the subsequent child is both horizontal 3/4 sibling and first cousin to any prior child. If the uncommon parents are father-son or mother-daughter then a subsequent child is a vertical 3/4 sibling and niece/nephew of any child by the elder generation parent. It's actually possible that the elder child/children are by the son/daughter and next child/children by father/mother of previous paring, but none known of this circumstance. The only reason I became aware of this is because one of my grandmothers was a horizontal 3/4 sibling. First husband of G grandmother dies, his brother marries the widow, actually not uncommon in the 1800s and early 1900s. Grandmother was the latter-born. I explained this to one of my co-workers once, a student from Russia. At first she said "Das messed up, dat like incest or some ting." I said "And they let you into Ga. Tech? Think about it." At first she frowned, understanding the dig, then she 'happy smirked' and said "Oh, right, dat not blood relation for mom, right? Dat not incest" and she laughed.
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