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Durham doctrine means

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For criminal law, be familiar with the different tests for insanity. The M'Naghten Rule (the "right-wrong" test) is the most important for the Indian context (Section 84 IPC). The Durham Rule (the "product" test) and the Irresistible Impulse test are other important concepts from comparative criminal law.
Updated On: Jul 13, 2026
  • That an accused is not criminally liable if his unlawful act is the product of immature understanding due to immature age
  • That an accused is not criminally liable if his unlawful act is the product of mental disease or mental defect
  • That an accused is criminally liable if his unlawful act even if it is the product of mental disease or mental defect
  • None of these
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The Correct Option is B

Approach Solution - 1

The Durham rule is commonly called the product test, and those words are the key to matching the right option.

  1. Immature age: Concerns a different defence altogether, infancy, not the Durham doctrine, which is about mental illness.
  2. Mental disease or defect causing the act: Matches the doctrine's very name, it excuses an accused whose unlawful act was caused by, or was the product of, mental disease or defect.
  3. Liable even with mental disease or defect: This reverses the doctrine's actual effect, which is to excuse, not impose, liability.

Since only one option ties criminal non-liability to an act being the product of mental disease or defect, the correct answer is that an accused is not criminally liable if his unlawful act is the product of mental disease or mental defect.

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Approach Solution -2

Comparing the Durham rule with the more familiar M'Naghten test, which Indian law follows under Section 84 IPC, helps confirm the answer.

  1. M'Naghten test: Asks whether, because of unsoundness of mind, the accused was incapable of knowing the nature of the act, or that it was wrong or contrary to law, a narrower, knowledge-based standard.
  2. Durham test: Uses a broader, purely causal standard, asking only whether the unlawful act was a product of a mental disease or defect, without requiring proof that the accused specifically failed to understand the nature or wrongness of the act.
  3. Option describing immature age: Belongs to a different defence entirely and does not describe either test.
  4. Option imposing liability despite mental illness: Contradicts both the Durham rule and the general principle that mental illness can excuse criminal responsibility.

Recognising Durham as the broader, purely causal alternative to M'Naghten confirms which option correctly states the doctrine.

Therefore, the correct answer is that an accused is not criminally liable if his unlawful act is the product of mental disease or mental defect.

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