The Chatham House Rule states:
"When a meeting, or part thereof, is held under the Chatham House Rule, participants are free to use the information received, but neither the identity nor the affiliation of the speaker(s), nor that of any other participant, may be revealed."
This means that when a meeting is held under the Chatham House Rule, people are free to use the information they learn, but they can't say who said it or who was at the meeting."
This rule helps people speak more openly, knowing their comments won't be directly attributed to them.