"Illiteracy" means that a scholar lacks literary knowledge and cannot pass the imperial examination. And "no line" means that a scholar lacks moral cultivation and cannot become a qualified official. Therefore, a scholar who has no writing style and deeds is difficult to succeed under the imperial examination system.
In addition, scholars who are "inconsistent with their words and deeds" will also be criticized by society. Because in a society with Confucian morality as the core, personal morality is very important. If a person has no good moral cultivation, then he can't be a respected official.
Therefore, "a man without words and deeds" is a derogatory term under the imperial examination system, suggesting that although these people have the title of literati, they cannot become successful officials without real knowledge and moral cultivation.