A feature marking instances of person as being "animate".

§1. This feature does just one thing: it applies an indicator property to things of the kind "animate", and a blank "before" property. This used to be accomplished by the Standard Rules in a clumsy sort of way (with a direct I6 code injection), but in the age of Inter we want to avoid that sort of tomfoolery.

void PL::Persons::start(void) {
    PluginCalls::plug(COMPLETE_MODEL_PLUG, PL::Persons::IF_complete_model);

int PL::Persons::IF_complete_model(int stage) {
    if ((stage == WORLD_STAGE_III) && (K_person)) {
        property *P_animate = EitherOrProperties::new_nameless(I"animate");
        property *P_before = ValueProperties::new_nameless(I"before", K_value);
        instance *I;
        LOOP_OVER_INSTANCES(I, K_object)
            if (Instances::of_kind(I, K_person)) {
                    P_animate, Instances::as_subject(I), TRUE, CERTAIN_CE);
                ValueProperties::assert(P_before, Instances::as_subject(I),
                    Rvalues::from_iname(Hierarchy::find(NULL_HL)), CERTAIN_CE);
    return FALSE;