He seems to have the idea that he was everywhere, experiencing, for instance, the corporal telling us recruits the story about the petite woman, in bootcamp. He judged this particular corporal to by lying. It might be so. Maybe the corporal was trying to toughen us up by saying “even a diminutive woman could do this” when it was really just a story to challenge us and push us along. In which case, we can congratulate BG not only for going back in history (a feature of his implied capacity to be everywhere) but also of wondrous psychological astuteness. It’s quite an impressive feat on his part.