According to the theory of true narratives, if the conquest of Ai narrative is factual, then it must necessarily correspond to the material time-space context to which it purports to be connected and which it purports to represent. From careful exegesis of the text of the conquest of Ai narrative in the 7 and 8 chapters of the Book of Joshua, a 14 parameter criterial screen is derived to assess the correspondence between the narrative and the three candidate sites for Joshua’s Ai that emerge from past research. Through the analysis summarized in this paper, Khirbet el-Maqatir is demonstrated to be the site of the fortress of Ai, and the conquest of Ai narrative is demonstrated to meet the criteria for being a true narrative.