I think the prosecutor just asked him about lying (does it mean you were lying because some of your statements were different) to tie his inconsistencies with Jenteals inconsistencies. So, if he changed words, added words, omitted things in certain statements, etc.... the defense would have to admit that his statements are in the same boat as Jenteal's statements since she did the same thing (so they can't call her a liar without admitting that he is a liar).