The Comparative study in the Arab and Persian graffiti from the Graysian perspective

The basis of the conversational coercion theory proposed by Paul Grace is principles that focus on studying the relationship between language and its recipient, with all the characteristics and characteristics contained in this relationship. Grace summarized these principles in four: the principle of quantity, quality, method, and occasion. And based on the Graysian perspective, if the speech takes into account the four principles, then it is called a process of requiring cooperation, and if it contradicts it according to special rhetorical purposes, then it is called a process of breaching cooperation. This study seeks to identify the phenomenon of conversational entailment and its breach in Arab and Persian mural writings, which have emerged as a new art in recent times in society and express the inner components of its author. the research examined 400Arab and Persian mural writings from a deliberative perspective to reveal the faces of cultural convergence between the Arab and Persian cultures. the results showed that a significant portion of Arab and Persian mural writings (Arabic %63 and Persian %59 ) violate the principles of graceful cooperation, and the reason is that the writer wanted to convey the message to his recipients in a suggestive form in order to indicate meanings that he cannot express. Thus, this level of similarity can indicate cultural similarities between Arabs and Iranians.