Social media's rapid rise has raised concerns among policymakers and the public regarding its role in spreading misinformation.
Content moderation is a key tool to combat misinformation, but it faces several problems when practiced at scale.
The core issue is the lack of a formally accepted definition for "misinformation".
Misinformation is information that runs contrary to or distorts generally accepted facts.
Author's summary: Social media faces challenges in combating misinformation.