'...and claim this doesn't count as real evidence?'
If the guy had replied saying he actually did know the person I would have to accept that as true. He didn't.
Despite recent evidence, this isn't The Guardian and I am willing to believe that most people here are honest and don't just make stuff up to suit their political agenda.
To answer your question, two lefty news articles and fakenews.com don't count as evidence, no. His word would have been good enough for me.
http://www.independent.co.uk/news/uk/politics/dwp-disabled-p...
https://www.theguardian.com/politics/2018/feb/12/disability-...
Happy now? Or are you perhaps going to try to play the no true Scotsman PR game and claim this doesn't count as real evidence?