Comment by niom

The root cause is impressionable subjects accepting priors from questions into the set of priors used to reconstruct memories. Formulating good questions that contain as few priors as possible is difficult, and the reaction of the interrogator to the subject's response will reveal additional priors. Most interrogators are probably not really all that invested into getting as close to the subject's ground truth anyway and are simply looking to by-and-large confirm a pre-established narrative.