Correct.
It is also easy. Media Matters (aka George Soros) has made it very easy for them to have a fake quote and then plausible deniability for relying on MM.
Law doesn’t work that way. In court, you can’t say “I did it because I was told it was ok.” That will land you in jail.
The only way they can avoid liability is by retracting.
I thought Media Matters was David Brock? Not that Soros wouldn’t fund him, either.