Studying the answer words "نعم" and "بلی" in the Holy Quran with an aesthetic approach

Letters are one of the main elements of the Qur'anic verses, and without understanding their meaning, the main meaning of the verses cannot be understood. Answer letters are letters that are used for various aesthetic purposes in the Qur'an. Among these, there are two letters "نعم" and "بلی" (yes) that have a special place, because "نعم" is used when the addressee confirms the previous sentence, whether that sentence is negative or positive. But "بلی" always comes after negation and its task is to negate and then prove the previous sentence. The present research tries to examine these words in the verses of the Qur'an with a descriptive-analytical method and with an aesthetic approach. What was found after the investigation was that the number of verses in which there was "نعم" was less than "بلی" and the reason for that was the position of negation and proof of the word "بلی" with regard to the main subject of these verses which is the resurrection. Also, "بلی" is divided into two categories: "direct answer" and "conclusion"; the first one is used in a specified conversation, which is mostly in the negation of the non-question previous phrase, the aesthetic purpose of which is repeating and confession, but the second one is related to the statement of the end of the matter, the main purpose of which is caution and guidance and emphasis on the attributes of God. Also, the verses that were used with "نعم" before them are devoid of negation and denial and have two purposes of rebuke and greed. It was also found that the displacement of each of them causes the loss of meaning and the loss of the main purpose of the text.