exposing the other examiners would have judgment made by the preliminary examiner would guarantee bias. so the examiner is elaborately trained not to produce any potential bias. >> it's -- i take it, it's well recognized that there can be that bias that someone who listens to something at the same time someone else is may be influenced by the impression or the opinion of the person sitting next to them. >> there is always danger of biasing others. >> and in your setting, you would not tolerate that? >> that is correct. >> that's not just good laboratory practice, i take it. that would also be good law enforcement practice as they would investigate a case with voice samples.