I'm not sure that multiplying sources guarantees the validity of information, since the vast majority of news production worldwide is handled by a handful of agencies (AP, AFP, Reuters, etc.). The information we see simply repeats what these agencies have provided them, their only contribution being the automatic addition of a Shutterstock image.

In the scientific field, it's the same: university communications departments disseminate narratives about their own researchers works, and the specialized press simply copies the press kit without much altering it.

In the financial and B2B world, it's similar: a few specialized companies disseminate narratives, and everyone repeats them.

Doing journalism is complex, it involves searching data and reasoning about it.

For example, in the 1970s, when I was young, only fringe sources mentioned the CIA's involvement with the United Fruit Company to aid South American dictators. Today, it's common knowledge.[0].

[0] https://en.wikipedia.org/wiki/United_Fruit_Company

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