Why do people who are surprised to see sometimes in Facebook's 'get acquainted'

If you are using Facebook, you may be surprised to see old friends and stakeholders who you have not even thought about "you might know" that you have seen at one time. Even if you are surprised to be surprised "How wonderful!" How can you feel like "How can you find out the connection with this person ... ...!?" That may sometimes even fear That ability is made in any way Is it there?

Why Facebook's 'People You May Know' makes some weird suggestions
https://www.usatoday.com/story/tech/columnist/2017/07/30/why-facebooks-people-you-may-know-makes-some-weird-suggestions/521264001/

It was sent to the American media "USA Today"William F. Yurasko's TwitterAccording to one day on Yurasko's Facebook "I know you", the name and face of the owner of the residential residence is displayed. There is only one point that Yurasko's relationship with the landlord has a lease contract, and he did not exchange e-mails, belonged to the same circle, or had community activities He said he did not even know the phone number of the owner.

On the Facebook help page, there is an item "What is" You know you "" and there are "Facebook users who have the potential of your acquaintance." Common friends, employment history, educational background , People will be displayed based on the information of the belonging network, imported contacts etc. "In Yurasko's case, none of the items were applicable, so the mystery deepens Just a situation.

What is [acquaintance]? | Facebook Help Center


About Facebook's "connection discovery ability" as if he / she sees everything, the journalist who is contributing to USA TodayRob PegoraroHe is investigating this issue. According to Mr. Pegoraro, the criteria that Facebook uses when it sees "get acquainted" is as follows.

· To have common friends. This is the most commonly used standard.
· You belong to the same Facebook group or are tagged on the same photo
· Included in acquaintance network such as school, university, workplace
· What is included in the address book uploaded to Facebook

Also, some of the following criteria are not used anymore or have never been used before.

· Positional position information. When there are common things in places you have visited so far, you decide to "know you". However, this is abolished because there are many problems, such as a store clerk who always visits is judged as "acquaintance".
· The case that your mail client software automatically adds the destination information to the address book and uploads it to Facebook
· Things that other people judge as "you know you" by referring to your profile page

So what exactly did Yurasko and the landlord connect to? According to Mr. Pegoraro, the possibility is that "the owner registered Yurasko's phone number in the address book and uploaded it to Facebook." Certainly in this case, even though Yurasko does not know the telephone number of the other party, there is a good possibility that Facebook judged "you know you" from the owner's side. Even if Yurasko does not know the owner's phone number, it is hard to imagine that the landlord has obtained Yurasko's number at the time of contract.

In other words, there may be cases where it is judged as "acquaintance" not only from one's own side but also from the partner side. It seems that SNS is best grasping that it is no longer connected with who you are and who you are acquainted with.