Social media giant agreed on Tuesday that location data was one of the factors it used but on Wednesday said no, not any more

Facebook has denied using location data to suggest potential friends amid questions about the unsettling accuracy with which it puts forward people you may know.

The feature has been known to suggest users who have no or few mutual friends on the network and, reportedly, nothing in common beyond having shared the same physical space prompting concerns about how it works.

Brian French (@BrianFrench2) June 19, 2016

Still amazed at how accurate the “people you may know” thing on Facebook is.

Leean (@leean_) June 19, 2016

Facebook’s people-you-may-know algorithm is so good it’s almost creepy

Izzy Avraham (@IzzyAvraham) June 28, 2016

A friend of mine says the devil’s in the sidebar on YouTube. I’d say the devil’s also in the ‘people you may know’ sidebar here on Facebook.

These were resurrected on Tuesday when Fusion reported that Facebook was drawing from the location of users smartphones to inform its suggestions a privacy disaster, it said.

It quoted a spokesperson as saying that location information was only one of the factors Facebook used to determine people who may know each other.

Seriously, Ive had enough reporters ask me, freaked out, why Facebook is recommending their protected sources, tweeted Violet Blue, a reporter on cybercrime, on Tuesday. Suck it up & stop using it.

But Fusion then published an updated statement from Facebook, which said it did not use location data though it had briefly in the past.

Fusions Kasmir Hill wrote that she had reportorial whiplash. Ive never had a spokesperson confirm and then retract a story so quickly.

The network ran a small test for four weeks at the end of 2015, in which it used users cities to rank existing suggested friends, the spokesperson said. Not all staff were aware that the test had ended.

Morgan Coln (@morganhoneyb) June 19, 2016

Every time I meet someone new, they appear in my People You May Know on Facebook

Karen B (@HabsGal78) June 19, 2016

Facebook “people you may know” option is annoying, especially the list with 1 or zero mutual friends… Christ. #Nope

On Wednesday a Facebook spokesman confirmed to the Guardian that it was not using location data, with the same statement as supplied to Fusion.

We may show you people based on mutual friends, work and education information, networks you are part of, contacts youve imported and other factors, he said. In its help section, Facebook says its suggestions are based on mutual friends, work and education information, networks youre part of, contacts youve imported and many other factors.

The opacity of these other factors aside, Facebooks sometimes disconcerting suggestions perhaps more accurately titled people you most definitely know, but have no intention of adding have been remarked upon since it introduced the feature in 2008.

Adam Rucker (@adamrucker) June 26, 2016

Honestly the “People You May Know” section on Facebook needs a trigger warning.

Brittany (@bwarnock) June 19, 2016

I never thought my life would be one of the ones ruined by Facebook putting a harrowing ex into “people you may know” but here we are.

(@M0O_MOO) June 28, 2016

Have you noticed on Facebook when you stalk someone so much they appear in the people you may know section

Last year Vices Motherboard investigated why users online dating matches were appearing as suggested friends, with inconclusive results. Facebook denied using information from third-party apps such as Tinder or OKCupid.

The most obvious explanation is that the platforms suggestions are informed by robust link prediction and modelling of its expansive social graph.

In-house analysis of its friend graph in February found just 3.57 degrees separating its 16 billion members. Within the US the gap was even smaller.

In the end, Facebooks friend-recommendation system isnt magic or malice just really good math, Caitlin Dewey, the Washington Posts digital culture critic, wrote last year.

Users nonetheless concerned about Facebooks use of their location settings can refuse it access in their phones privacy settings. They can also check which, if any, of their contacts have been imported and request to have them removed on their invite history page.

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