理路

lǐ lù bù qīng de wén zhāng nán yǐ xiū gǎi

理路不清的文章难以修改。

It's most difficult to correct an article with poor logical thinking.

tā měi jù huà dōu zài lǐ lù shang

她每句话都在理路上。

Each of his sentences followed her line of reasoning.

tā de lùn wén lǐ lù bù qīng

她的论文理路不清。

Her paper lacks coherence.