(A) The 'four analytical knowledges.' These are the same as the siwuaizhi 四無礙智 and the siwuaibian 四無礙辯. (B) The 'four unobstructed knowledges.' (1) To be unobstructed in the knowledge concerning the meaning of the teachings. (2) To be unobstructed in the knowledge of dharmas. (3) To be unobstructed in the knowledge about various languages. (4) To be unobstructed in preaching.