/tə plid ˈɪɡnərəns/ – Phrase
Definition: viện cớ không biết.
A more thorough explanation: “To plead ignorance” means to assert or claim that one is unaware of or lacks knowledge about a particular fact, circumstance, or law, typically as a defense or excuse in a legal proceeding.
Example: The defendant cannot plead ignorance of the law as a defense in this case.