Somewhere a system was mapping out the flow of people, and controlling them with these gentle hints. After a few moments Oscar simply forgot about the little murmurs; he was still aware of them, but not consciously. The nonverbal nagging was so childishly insistent that accommodating it became second nature. Soon the four of them were moving to avoid the crowds, well before any approaching crowds could actually appear. Everyone was wearing the earcuffs, so computation was arranging human beings like a breeze blowing butterflies.