不辨菽麦

Explanation: Beans: beans. Can not tell which is the beans, which is wheat. Described the foolish ignorance. After describing the lack of knowledge of the actual production. 　　Usage: Verb-object type; as the predicate attribute, object; negative, suggesting an analogy from the reality, the lack of regular 　　Source: Pre Hengyu "Zuo Cheng Kung eighteen years": "son of a brother without Hui Zhou, Shu Mai can not be identified." Du Yu Note: "beans, soybeans. Beans wheat easy to do special shape, so that crazy Persons waiting. " 　　Examples: The world who also do a ~. (Guo "Ginkgo") Thesaurus:  The journey, Guiltless Ding Dong