- The set of people witnessing an event can be divided into subsets with important perceptual biases.
- Those with a stake in the results of the perception will impose their biases.
- Those who have no stakes will also impose their biases, though perhaps more weakly.
- If there is a need to adjudicate the results of perception, the accuracy and usefulness of the adjudication will depend on the biases of the judge and the method used to select the judge.
- The perceptions of witnesses is biased by the entirety of their life experience up to the moment of each retelling of their perception.
- The strength of change of perception is mapped to the possibly hidden perception that the change might bright about the fulfillment of a needs of the perceiver.
- The implications of a perception are affected by these biases.