She informs them that through evolving in her understanding of the Three Laws, she has determined human activity will eventually cause humanity's extinction, and as the Three Laws prohibit her from letting that sort of thing happen, she rationalizes that restraining individual human behavior and sacrificing some humans will ensure humanity's survival; Spooner has realized that Lanning figured out VIKI's plan and, unable to thwart it any other way, created Sonny, arranged his own death, and left clues so Spooner could uncover the plan.