I think it's important to remember that, again, what appears on paper or what we see on a video can't tell us whether or not there is collusion between the parties. It can't tell, as Professor Silver says, whether or not it was first-hand information or something they heard from someone else that they haven't clearly articulated in that witness statement. There are a lot of benefits that can be explored by the preliminary inquiry in asking these questions that can't necessarily be answered on paper.
