An observable moment in which AI support helps a user put a pre-existing but unformed thought into words, evidenced by the user accepting a formulation that expresses an intent they had already signaled.
One occurrence is coded when the user adopts, verbatim or lightly edited, an AI-offered phrasing for an idea the user had gestured at earlier in the session and confirms it matches their meaning.
Proposed measurement protocol (not yet empirically validated): Acceptance count plus self-report: the number of articulation-assist turns accepted per session, paired with a single-item agreement rating ('this captured what I meant', 1-7 Likert) recorded at each acceptance.