Takhyir grants a choice among available alternatives. Ibahah may permit either course. Ijmal occurs when the intended item remains unspecified and requires clarification.
Aw does not yield one identical legal result in every context. In a performative act, an authorized person may need to exercise a choice. In a report or admission, the identity of the subject may instead require explanation.
It is insufficient to label aw simply as “doubt.” One must identify whether the statement grants choice, leaves an ambiguity, or refers to an unspecified alternative.