Duty bound by the rule body

Intention

I want to bind the duty bearer with a positive premise.

Correct formFrozen execution sceneBoundary

Incorrect form and why it stays silent

Incorrect form

rule R strict { for p: Person; when true; then duty File { bearer p; achieve done(p) during [@2026-09-01, @2026-09-10]; }; }

for declares a variable but does not enumerate persons. A rule head must be bound by the body; current check and lower both reject with E4101. The old catalogue claim of a green check is no longer reproduced.

Correct form

Arxo Law

language "law.core" version "0.2";
package recipes.a.r14 version "0.1.0";
namespace "urn:recipe:a-positions:14";

entity Person;
relation registered(p: Person);
relation done(p: Person);
rule R strict { for p: Person; when registered(p);
    then duty File { bearer p; achieve done(p) during [@2026-09-01, @2026-09-10]; };
}

Frozen execution scene

Facts and snapshot	Question	Answer
one named person; 2026-09-05	positions()	position_count(File, ACTIVE, 1); / COMPUTED
no premise; 2026-09-05	positions()	not positions_present(); / COMPUTED

named bearer creates one duty

Arxo Law

test "named bearer creates one duty" {
    given {
        context {
            legal_time @2026-09-05;
            decision_time @2026-09-05T09:00:00+05:00;
            knowledge_time @2026-09-30T09:00:00+05:00;
            timezone "Asia/Almaty";
        }
        assert registered(entity_ref("urn:recipe:a-positions:14:p"));
    }
    evaluate positions();
    expect position_count(File, ACTIVE, 1);
    expect evaluation_status == COMPUTED;

}

no premise creates no position

Arxo Law

test "no premise creates no position" {
    given {
        context {
            legal_time @2026-09-05;
            decision_time @2026-09-05T09:00:00+05:00;
            knowledge_time @2026-09-30T09:00:00+05:00;
            timezone "Asia/Almaty";
        }

    }
    evaluate positions();
    expect not positions_present();
    expect evaluation_status == COMPUTED;

}

Python

>>> import runpy
>>> check = runpy.run_path("docs/recipes/a-positions/resources/check.py")
>>> check["check_boundary"](https://github.com/arxohq/law/blob/master/docs/recipes/a-positions/14)
'А14: граница проверена'

Counterfactual

Mutation: when registered(p); → when true;; rejection LDC-E4101. Additional counterfactuals are shown as separate scenes.

Boundary

An event binder in activation is the special form for event activation, not a licence for an arbitrary bearer. Rules over underived persons do not create positions.