だに + しない

だに emphasizes extreme contrast or impossibility by highlighting a small or obvious thing as a basis for the statement. When paired with しない, it expresses that not even that small, obvious thing is possible or done. It conveys a sense of astonishment or strong negative emphasis about one’s actions or outcomes. This pattern is often used in formal or literary contexts and tends to appear in spoken language with a touch of emphasis or irony. Typical contexts include criticizing someone for failing to do something that should be trivial, or describing something so unlikely that even the simplest example would not occur.