Knowledge of weight of a controlled substance is not an element; knowledge of what is required?

• A. The nature of the substance
• B. The weight of the substance
• C. Its price
• D. Its origin

Answer: (A)

The key idea is that for many controlled-substance offenses, the mental state focuses on the substance’s identity, not its measurements. You must know what the substance is—the nature or identity of the drug—and that it is a controlled substance. The actual weight or amount isn’t what the crime requires you to know to be guilty; that information may matter for sentencing or classification, but it doesn’t establish the culpable state of mind. Similarly, price and origin aren’t typically relevant to proving the offense, because they don’t relate to whether you possessed a controlled substance. So knowing the substance’s nature is the essential knowledge for liability.