https://en.wikipedia.org/wiki/Media_Bias/Fact_Check:
> The Columbia Journalism Review describes Media Bias/Fact Check as an amateur attempt at categorizing media bias and Van Zandt as an "armchair media analyst."[3] The Poynter Institute notes, "Media Bias/Fact Check is a widely cited source for news stories and even studies about misinformation, despite the fact that its method is in no way scientific."[4]
I doubt that we can achieve absolute objectivity, that's why I wrote that I consider it fairly objective, not that it is. That said I don't see a reason why should Columbia Journalism Review or Poynter Institute be any better arbiters of what is correct way to measure bias. (Especially because both are competition.)
Also Poynter Institute has record of "weaknesses in the methodology".[1]
Having a bias doesn't in itself imply lack of objectivity, in relation to what we call 'facts' and 'truth'. It would seem somewhat of a coincidence if 'center' (politically) is right where that lies.
Not that I'm saying that 'reality has a liberal bias', as some would. I personally think it has a left bias, but I'm not nearly certain enough of my opinions to make that claim!
https://mediabiasfactcheck.com/npr/