俱舍論疏 28.71

28.71

The Śāstra says: "Therefore, the established reason is free from the fallacy of being unestablished (asiddha)," which summarises the above statement. Because it lacks form, it is called "formless"; thus the reason is not flawed by being unestablished. That your school does not accept it goes against reason and teaching. Since you go against the teaching, our [reason] is not unestablished.