deterministic: a contact or manual field, resolved without a model. ai: answered by the runner.
Verbatim what the field was answered from — the annotation's prompt, or the prompt-less field's sub-field list.
Hand this back through renderAnswers to redraw the field later. Null: the field ships blank.
Boxes this answer left blank and why — no-boxes means nothing says where to write it.
The answer as text, in box order; empty when the field ships blank.
One field of the preview: the question asked, the answer produced, and where it lands.