This is a hypothetical legal problem. An article was published that contained defamatory matter, the media company that were initial publishers republished the article on their public Facebook page. Under authority of Fairfax v Voller, they are liable for third-party comments made that are defamatory. However, I was wondering if the comments need to be reflective of the defamatory matter in the article, or can they just be defamatory in the general sense of the word? Say, a FB user makes a comment on the article post, however the comment references the subject of the article but not the defamatory matter about the subject - rather defamatory matter about the subject that was found in a completely separate article.