Consider how a businessman might compose a letter. When precise wording is important, he writes the letter himself or dictates it to his secretary word for word.
هَلْ أُوحِيَ إِلَيْهِمْ بِكَلِمَاتٍ مُحَدَّدَةٍ أَمْ بِمُجَرَّدِ أَفْكَارٍ يُعَبِّرُونَ عَنْهَا بِكَلِمَاتِهِمِ ٱلْخَاصَّةِ ؟‏