"Self-Contradiction" comes from Han Feizi, Chapter "Nan Yi." It tells of a man from the State of Chu who sold spears and shields. He first praised his shields as so strong that nothing could pierce them, and then praised his spears as so sharp that nothing could withstand them. Someone asked: What would happen if you used your spear to pierce your shield? The man could not answer. This idiom refers to words, actions, or logic that contradict themselves and cannot be made consistent. Its deeper meaning lies in exposing logical errors in thought or expression and emphasizing the principle of consistency. It is used in a wide range of contexts, including everyday arguments, academic discussions, and legal debates, to criticize someone's argument or behavior as self-contradictory. In cultural background, it reflects ancient Chinese logical thought, especially the Mohist and School of Names' discussions of the law of contradiction. Its emotional tone is generally derogatory, often carrying irony or criticism, though it can also be used for self-mockery. Understanding it helps improve logical thinking and rigor in expression.
📝 Example
1. He says health is the most important thing, yet he stays up late every day playing video games—what a contradiction. (Describing inconsistency between words and actions.)
2. The data and conclusions of this report contradict each other, making it utterly unconvincing to readers. (Referring to logical conflict.)