How do you know that information provided by someone else is accurate/reliable? How reliable do others find that source?
“Facebook To Alter Its News Feed,” The Wall Street Journal, January 20, 2018 B1. FB will “start ranking news sources it its feed based on user evaluations of credibility….”
So, your reputation for truth and veracity affects how highly information you provide gets placed. What ever did we do before Facebook? Trust newspapers to verify before they published?