Hi!
I'm curious to know how many cases we have where
two people share both
a name and a birthdate *but are confirmed to be different people*. I
I'm not sure how you specify "confirmed to be different", but otherwise
this query might do:
http://tinyurl.com/jjpnhuo
It shows each pair twice (because I'm lazy :) and I have no idea if they
are same person of different - short of explicit usage of P1889 which
almost never happens I don't think there's a good generic way.
One pair that seems to be different is:
https://www.wikidata.org/wiki/Q644401
https://www.wikidata.org/wiki/Q510034
but short of manual examination I see no way to know one way or another.
--
Stas Malyshev
smalyshev(a)wikimedia.org