multiple sources of truth and cross validation
Following up on: https://github.com/openvocab/exchange/issues/2 How holodex relationships get stored, where each Agent publishes to its autonomous data space? https://github.com/holodex/enspiral-data/blob/master/relationships.csv
In such case, for each relation between two Agents, we will always have at least two web resources which describe this relation, each from one of the agents perspective. Similar to my comment https://github.com/jasnell/w3c-socialwg-activitystreams/issues/180#issuecomment-119541477
In https://github.com/hackers4peace/plp-docs/issues/12#issuecomment-78043877 I see you use symetric property to link both.
Once again, http://opencreds.org/ seem to me very promising here...