The Yusok chirui ron （Treatise on Questions Between Confucianism）. An apologetic treatise written during the early Choson period in which the unknown writer defends Buddhism from Neo-Confucian criticisms based on a harmonized philosophical view of the three teachings 三教. Some historians attribute the authorship of this work to Kihwa 己和， as he is known to have composed a similar piece during roughly the same time period， but due to numerous stylistic differences between this and Kihwa's other works， this theory remains tenuous. HPC 7.252b-278c.