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It's directional. The calculation is 6x6 = 36.

The simplest example is with two people. John is a different person from Mary, so both John and Mary have a relationship with each other. 1x2 = 2 relationships.

Shouldn't that be 6x5=30? Unless you count everyone's relationship with themselves.... [this also aligns with the 5+4+3+2+1 version, it's just n*(n-1)/2 ]

He probably meant to say 30, since he did set the diagonal elements to zero in his N = 2 answer (otherwise he would have said 4).


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