The study of occasions distinguishes the historical descent of a verse from its later applications. The study of Qur'anic narratives separates established particular events from representative portraits. Tawjīh uses language, evidence and circumstances to resolve apparent difficulties.
A practical method is to read the wording in context; classify and evaluate the associated report; distinguish an original occasion from later application; retain only verified event-specific details where necessary; and resolve apparent discrepancies through the relevant circumstances and other evidence.
Historical research and close reading complement one another. Neither can simply replace the other.