Dario Taraborelli, 21/11/2015 18:34:
I spent most of my time manually auditing automatically matched entries from the Dizionario Biografico degli Italiani [2].
Thank you! That's very useful. I did some thousands too. :)
My favorite example? Mix’n’ match suggested a match between /Giulio Baldigara /(Q1010811 https://www.wikidata.org/wiki/Q1010811) and /Giulio Baldigara/ (DBI http://www.treccani.it/enciclopedia/giulio-baldigara_%28Dizionario_Biografico%29/) which looked totally legitimate: these two individuals are both Italian architects from the 16th century with the same name, they were both born around the same years in the same city, they were both active in Hungary at the same time: strong indication that they are the same person, right? It turns out they are brothers and the full name of the person referenced in Wikidata is /Giulio Cesare Baldigara/ (the least known in a family of architects). I unmatched the suggestion and flagged the DBI entry as non existing in Wikidata.
Yes, this happens every now and then with Europeans that time, also with father and son having very same name and very same field of activity or even publications. Creating an item is good, as long as you have at least one piece of distinguishing information. The standard practice (at least on it.wiki) in such very ambiguous cases is to add a disambiguation page or note, even if the target article doesn't exist yet. In https://it.wikipedia.org/wiki/Antonio_Montanari I went the extra mile and also added more information, including a source: you can go into any level of detail, unlike on Wikidata. I encourage you to create a disambiguation page at https://it.wikipedia.org/wiki/Giulio_Baldigara with all the information you told us here (policy reference: https://it.wikipedia.org/wiki/Aiuto:Disambiguazione#Link_rossi ).
Nemo