DNA testing gives limited information about whether people are likely to be related. But even if we overcame the many practical and legal hurdles to implementing it, what’s the point?
What are the rules that make a man a father?
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Before the advent of genetic testing, definitions of paternity were primarily social and legal. Science has destabilized these older definitions, but it has not replaced them.
The often remade song “He Ain’t Heavy… He’s My Brother” probably owes a good deal of its enduring popularity to its depiction of the loving familial bond between two siblings - one aiding the other despite…