If MBFC would rate all right leaning media source as not factual/not trustworthy, yes, it would be a clear sign that it would be biased itself. But it doesn't.

Example of right leaning media with good rating : https://mediabiasfactcheck.com/daily-signal/
Example of left leaning media with bad rating : https://mediabiasfactcheck.com/change-org/

My work here as a moderator is to give context. I won't ask of our reader to believe or not the article, just to take the time to do their own research in order to complement the article, which may intentionally not show the whole story.

Edit : link to the explanation of their methodology : https://mediabiasfactcheck.com/methodology/

[–] beaxingu@kbin.run -4 points 7 months ago

im just saying that if you do that for one you have to do it for all and definitely if all are talking about the same thing. and like i said are you going to use a bias check for the biased checker because they all do the same thing just not check themself. the bias check seems to be a never ending circle.