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A comment on Human Connectome Project Updates. Parent comment

Re:Human Connectome Project Updates by nitrogen on Thursday June 30, 2016 @02:40AM (#12006972)
What is 1-(1/365)?
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Re:Human Connectome Project Updates by FeepingCreature on Thursday June 30, 2016 @05:51AM (#12007512)
Should probably involve the population there somewhere?
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Re:Human Connectome Project Updates by Ntrails on Thursday June 30, 2016 @10:29AM (#12008780)
Sort of.

If I have a population of 1, or <= 365 and uniform dist of birthdays, the probability of a date being a valid identifier is 100%.

If I have a population of 365 with randomly distributed birthdays, then it is going to be the probability of not sharing a birthday with any of them (very low)

Once you can guarantee at least 2 people with each birthday the identifier is simply zero percent effective.

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