The repair strategy depends on the nature of the issue, and may involve asking the speaker to repeat themselves, to clarify, to correct, to define, to paraphrase or something else. If a “trouble source” occurs, a user could choose to initiate repair or use a “let-it-pass” strategy. The initiation of repair is often accomplished by asking a question. The interactional force of questioning may be achieved with interrogative syntax, but also could be indicated with question marks, dashes, explicit statements of non-understanding and presenting candidate understandings. Secondary strategies include declarations of non-understanding (“I don’t get it”, “unclear”) and dictionary look-ups.