tā / wán quán / shì / gè / lǐ máng / gēn / tā / jiǎng dào lǐ / jiù shì / duì niú tán qín

他完全是个理盲，跟他讲道理就是对牛弹琴。

He is completely unreasonable; reasoning with him is like casting pearls before swine.