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Facebook said its users were separated by 3.57 degrees, but the 2016 result meant 4.57 friendship links on average across 1.59 billion active accounts, not all humanity
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Silicon Canals
In February 2016, Facebook announced that the average user was separated from every other user by 3.57 degrees.
And Facebook counted “degrees” as the people between two users, making 3.57 degrees equivalent to an average shortest path of 4.57 friendship links.
Its 3.57 figure therefore described 3.57 intervening people on an average path, or 4.57 Facebook friendship edges.
Facebook’s 2016 number was 3.57 intermediariesFive years later, Facebook had more than doubled the graph to 1.59 billion active accounts.
It showed that 1.59 billion active accounts in one 2016 platform snapshot had an estimated average of 3.57 intermediaries, or 4.57 friendship links.