Unverified Twitter accounts in Google Knowledge Graph panels?

It appears that Google is showing unverified Twitter profiles in their Google Knowledge Graph panels in Google Search.

As an example search Gabe Newell, which shows an unverified Twitter account on the panel (incidentally it’s not even his real Twitter account):

gabe newell unverified twitter knowledge graph

From Google’s developer documentation (and all other sources I’ve read), this should not be possible – because Twitter supports verified accounts, Google will only show verified accounts:

Google only shows verified profiles for sites with a verification process.


Is this just an unexplainable glitch or has Google changed their policy and not yet updated it in their documentation? If the latter, is there any information about this change in policy?