Criteria for decision making
Is this primary source information?
Was it
- collected or created at the time of the event?
- witnessed first-hand, in person, by an observer or participant?
- based on observation of the event?
Is this secondary source information?
Was it
- created after the event by someone not present?
- based on an analysis or interpretation of the event?
- created at a distance in space or time from the event?