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Can you elaborate? It seems like simple logic, if 300 million people out of the total population of humans have depression and Facebook has 1200 million users. Then at least 75% of its user base must not be depressed. Because if any more then 75% were depressed then there would be more then 300 million people with depression.

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I doubt this is what the parent comment was suggesting, but...

~10% profiles are fakes/bots

x% are duplicates

x% are created as business profiles

FB has more fake profile than 186 out of 196 countries actually have people, in fact all but the top 10 countries by population. Therefore, more than 75% of FB users (distinct from profiles) could suffer from depression.

Oh, my mistake. I didn't realize that was what the 75% figure was based on.

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