Update 2026-06-30-logic-principles-of-the-expression_v4.md

elements/neuron/appunti/2026-06-30-logic-principles-of-the-expression_v4.md

@@ -443,6 +443,20 @@ evaluation and preparation that action requires, and together they close a ring
 alone. This is the same frame as category I — there is no ring-bearing "self," only local
 components whose coupled actions we describe as one closing ring.
 
+**Action is always local; evaluation and preparation may be local or contextual.** This is the
+axis beneath the previous point. A phase is *local* when the acting component supplies it itself,
+*contextual* when a surrounding or higher component supplies it. Evaluation and preparation come in
+both forms: the presynapse evaluates its own release and prepares its own next release (local),
+while the calcium channel's influx is evaluated by the presynapse and prepared by neuronal
+provisioning (contextual). Action admits no such split — it is always local, and necessarily so.
+A component can hold an aggregate and evaluate a neighbor's trace on its behalf, or provision a
+neighbor's readiness; but it cannot *act on a neighbor's behalf*, because the action simply is the
+local event occurring in that component. To perform another's action would mean it was never that
+component's action to begin with. Acting-for-another is not action but signalling. So the one phase
+that can never be contextual is action, and this falls directly out of what action is — which is
+why every component necessarily has its own action, while its evaluation and preparation may be
+scattered into its context.
+
 **The phases are event-delimited and decay-timed, never clocked.** A phase has no fixed duration.
 The action is the boundary where preparation ends and behaving begins; the fast trace's decay below
 threshold is roughly where evaluation ends and preparation resumes. The quiet interval between