(also known as factivity)

• Saurí & Pustejovsky 2009 - FactBank: a corpus annotated with event factuality
  • Levels of possibility: improbable, slightly possible, possible, fairly possible, probable, very probable, most probably, most certainly, certainly (see page 12)
• Sauri 2009 - FactBank 1.0 Annotation Guidelines
• FactBank and the Stanford PragBank Extension (webpage)

Prompt to break down sentences into independent facts: (from Min 2023)

• Vigus et al 2019 - A Dependency Structure Annotation for Modality

• Epistemic Modality
  • Automatic Fact Checking
  • Hallucination and Factivity