Bar Exam (Uniform) Quiz: Intoxication And Mistake

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Intoxication And MistakeQuestion 1 of 20

A federal statute makes it a crime to 'willfully structure financial transactions to evade reporting requirements.' An accountant advised her client that this law only applied to transactions involving foreign banks. Relying on this advice, the client structured a series of domestic cash deposits to stay under the $10,000 reporting threshold. The accountant's advice was incorrect. The client was charged under the statute.

The client argues that his reliance on the accountant's advice constitutes a valid mistake of law defense. How is a court most likely to evaluate this argument? Select one.

The defense will fail because ignorance of the law is not an excuse, and reliance on private counsel does not change this rule.

The defense will fail unless the accountant provided the advice in a signed writing under a formal retainer agreement.

The defense may succeed because a good-faith mistake about the scope of a complex law can negate the 'willfulness' element, which requires a known violation of a legal duty.

The defense may succeed because the accountant becomes a co-conspirator, shifting primary liability away from the client.

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Bar Exam (Uniform) Quiz

Bar Exam (Uniform) Quiz: Intoxication And Mistake

Practice Intoxication And Mistake in Bar Exam (Uniform) with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Intoxication And Mistake, giving you a quick way to practice the rules, question types, and explanations that matter most for Bar Exam (Uniform).

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

The client argues that his reliance on the accountant's advice constitutes a valid mistake of law defense. How is a court most likely to evaluate this argument? Select one.

The defense will fail because ignorance of the law is not an excuse, and reliance on private counsel does not change this rule.
The defense will fail unless the accountant provided the advice in a signed writing under a formal retainer agreement.
The defense may succeed because a good-faith mistake about the scope of a complex law can negate the 'willfulness' element, which requires a known violation of a legal duty. (correct answer)
The defense may succeed because the accountant becomes a co-conspirator, shifting primary liability away from the client.

Explanation: The correct answer is C. Generally, mistake of law is not a defense. However, when a statute requires 'willful' conduct, particularly in complex regulatory areas like tax or banking, courts have interpreted 'willfully' to mean an 'intentional violation of a known legal duty.' Therefore, a defendant's good-faith belief that their conduct was lawful, even if that belief was based on a mistake of law, can negate the element of willfulness. Choice A states the general rule but misses this specific exception. Choice B adds irrelevant factual requirements. Choice D misapplies conspiracy law and does not address the client's own culpability.

Question 2

A man was prescribed a medication that, according to a warning label, could cause drowsiness and should not be taken with alcohol. Disregarding the warning, the man took a dose of the medication and drank several beers. He experienced a much more severe intoxication than he expected. While in this state, he got into his car and caused an accident, injuring another driver. He is charged with vehicular assault, defined as 'recklessly causing injury to another while operating a motor vehicle.'

The man argues that he was involuntarily intoxicated because the intoxicating effect was unexpectedly severe. How should his state of intoxication be classified? Select one.

Voluntary, because he knowingly disregarded a warning and consumed two intoxicating substances. (correct answer)
Involuntary, because the severe reaction was a pathological effect of mixing the substances.
Involuntary, because he did not intend to become so severely impaired that he could not drive safely.
Partially voluntary and partially involuntary, requiring the court to apportion his fault.

Explanation: When analyzing intoxication defenses in criminal law, the key distinction is whether the defendant's impaired state resulted from voluntary or involuntary consumption of intoxicating substances. The voluntariness is determined by the initial decision to consume, not by whether the defendant anticipated the exact degree of impairment. Answer A is correct because the man made a conscious choice to disregard clear warnings and consume both medication and alcohol. The legal standard focuses on whether he voluntarily took the intoxicating substances, which he clearly did. The fact that the combined effect was more severe than expected doesn't transform his voluntary consumption into involuntary intoxication. Answer B incorrectly suggests that an unexpectedly strong reaction creates involuntary intoxication. However, pathological intoxication still stems from voluntary consumption when the person knowingly takes intoxicating substances despite warnings. Answer C misunderstands the legal test by focusing on the defendant's intent regarding the level of impairment. Voluntary intoxication doesn't require that someone intend to become severely impaired—only that they voluntarily consume substances they know to be intoxicating. Answer D creates a non-existent legal category. Courts don't apportion intoxication between voluntary and involuntary components when the initial consumption was clearly voluntary. Remember this key principle: voluntary intoxication occurs whenever someone knowingly consumes substances they're aware can cause intoxication, regardless of whether they anticipated the specific degree of impairment. The warning label here makes the man's knowledge explicit, sealing the case for voluntary intoxication.

Question 3

A state statute defines second-degree battery as 'recklessly causing substantial bodily harm to another.' A defendant was at a shooting range, a place he had never been before. Unfamiliar with firearm safety rules, he pointed what he believed to be an unloaded pistol at his friend as a joke and pulled the trigger. The gun discharged, seriously injuring the friend. The defendant honestly believed the gun was unloaded because he had watched his friend remove the magazine, not realizing a round could remain in the chamber.

The defendant asserts a mistake of fact defense. What is the likely outcome? Select one.

The defense will succeed because the defendant's honest belief that the gun was unloaded negates the mens rea for battery.
The defense will succeed because a person cannot act 'recklessly' with respect to a risk of which he is unaware.
The defense will fail if the jury finds that the defendant's belief was unreasonable and his conduct was a gross deviation from the standard of care of a reasonable person. (correct answer)
The defense will fail because mistake of fact is not a defense to crimes that result in substantial bodily harm.

Explanation: The correct answer is C. The crime requires a mens rea of recklessness. A person acts recklessly when they consciously disregard a substantial and unjustifiable risk. Even if the defendant was not subjectively aware of the risk, he can still be found reckless if his lack of awareness was due to a gross deviation from the standard of care a reasonable person would observe. A jury would likely find that pointing a gun at someone and pulling the trigger, without personally verifying it is empty, is such a deviation. Choice A incorrectly applies the standard for specific intent crimes. Choice B is an incorrect statement of the law of recklessness, which includes disregard of risks that should have been known. Choice D is an incorrect overstatement; mistake of fact can be a defense to such crimes if it is reasonable.

Question 4

You are a criminal defense attorney. Your client is charged with burglary after he became severely intoxicated at a fraternity party and entered the wrong house on the street, believing it was the fraternity house. He was found asleep on the living room floor. The jurisdiction's statute defines burglary as 'unlawfully entering the dwelling of another with the intent to commit a crime therein.'

What is your client's most viable defense strategy? Select one.

Argue that his mistake of fact about which house he was entering was reasonable due to the houses' similar appearances.
Argue that his severe intoxication rendered his entry into the house an involuntary act.
Argue that the resident's failure to lock the door constituted implied consent to enter.
Argue that due to his severe intoxication, he did not form the specific intent to commit a crime inside the dwelling. (correct answer)

Explanation: This question tests your understanding of specific intent crimes and how intoxication affects the mental state required for burglary. Burglary requires both the physical act of unlawful entry AND the specific intent to commit a crime inside the dwelling at the time of entry. Option D is correct because burglary is a specific intent crime, meaning the prosecution must prove the defendant formed the intent to commit a crime inside the dwelling. Severe intoxication can negate the formation of specific intent, even when the defendant can still perform physical acts. If your client was so intoxicated that he couldn't form any intent to commit a crime (since he thought he was entering the fraternity house), this directly attacks a required element of the offense. Option A fails because mistake of fact about the house's identity doesn't eliminate criminal liability for burglary - he still unlawfully entered someone else's dwelling. Option B is incorrect because voluntary intoxication typically doesn't make acts involuntary; the client still chose to enter the house, even if impaired. His movements were still volitional acts under the law. Option C is legally unsound - an unlocked door never constitutes implied consent to enter someone's home, and this wouldn't be a recognized defense. When facing intoxication-related criminal defenses, remember that voluntary intoxication can negate specific intent but rarely negates general intent or makes acts involuntary. Always identify whether the crime requires specific intent, then assess whether the intoxication level could prevent forming that particular mental state.

Question 5

A defendant was charged with grand larceny for stealing a diamond ring from a jewelry store. The defendant claims that at the time of the offense, he was suffering from a 'gambling disorder,' a recognized mental illness, which created an irresistible impulse to steal valuables to pay off his gambling debts. The jurisdiction follows the M'Naghten rule for insanity and does not recognize a separate 'irresistible impulse' test.

The defendant's 'irresistible impulse' claim is best characterized as which type of defense? Select one.

An insanity defense, though one that is unlikely to succeed under the governing standard. (correct answer)
An intoxication defense, as the gambling compulsion is akin to an addiction.
A mistake of fact defense, as he mistakenly believed his actions were justified.
A mistake of law defense, as he was ignorant of the laws against larceny.

Explanation: When you encounter a question about mental state defenses in criminal law, focus on identifying what type of mental condition is being claimed and how it relates to the defendant's understanding or control at the time of the offense. The defendant's gambling disorder claim is indeed an insanity defense, specifically attempting to invoke the "irresistible impulse" theory. This theory argues that even if a defendant knew their actions were wrong, they were unable to control their behavior due to mental illness. However, since the jurisdiction follows only the M'Naghten rule, which focuses on whether the defendant knew the nature and wrongfulness of their act, this defense won't succeed. M'Naghten doesn't account for cases where defendants understand right from wrong but claim they couldn't control themselves. Answer B incorrectly categorizes gambling disorder as intoxication. Intoxication defenses involve substances that impair cognitive function, not behavioral compulsions from mental illness. Answer C mischaracterizes the claim as mistake of fact. The defendant isn't claiming he was mistaken about any factual circumstances—he knew he was taking someone else's property. Answer D is wrong because this isn't about ignorance of the law. The defendant understands that theft is illegal; he's claiming his mental condition made him unable to resist. Remember that different insanity tests focus on different aspects of mental capacity. M'Naghten emphasizes cognitive understanding ("right from wrong"), while other tests like the Model Penal Code also consider volitional capacity ("substantial capacity to conform conduct"). Always identify which test applies in the jurisdiction before analyzing the defense's viability.

Question 6

A defendant is charged under a statute that makes it a felony to 'willfully deliver a controlled substance.' The defendant, a pharmacist, misread a poorly written prescription and gave a customer a powerful opioid instead of a prescribed anti-inflammatory drug. The customer suffered a non-fatal overdose. The pharmacist argues that his error was a mistake and he had no intent to unlawfully deliver a controlled substance.

The pharmacist's argument is best characterized as what type of defense? Select one.

Involuntary intoxication, because he was not aware of the true nature of his actions.
Lack of a voluntary act, because he did not intend to select the wrong bottle.
Mistake of law, because he misunderstood his legal duty under the prescription.
Mistake of fact, because he was mistaken about which drug he was dispensing. (correct answer)

Explanation: When analyzing criminal defenses involving intent, you need to distinguish between different types of mistakes and mental state defenses. The key is identifying what the defendant was actually mistaken about and how that relates to the required mental state. The pharmacist's argument centers on mistake of fact because he was genuinely confused about the physical reality of which drug he was dispensing. He misread the prescription due to poor handwriting and selected the wrong medication based on this factual error. This directly negates the "willful" intent required by the statute—he didn't intentionally choose to deliver a controlled substance unlawfully; he thought he was dispensing the prescribed anti-inflammatory. Answer D correctly identifies this as a mistake about the factual circumstances. Answer A is wrong because involuntary intoxication involves impairment from substances taken unknowingly or under duress. The pharmacist wasn't intoxicated—he simply misread something. Answer B fails because this isn't about voluntariness of the physical act. The pharmacist voluntarily reached for a bottle and dispensed medication; his mistake was about which bottle he selected, not whether the selection itself was voluntary. Answer C mischaracterizes the error as legal rather than factual. The pharmacist understood his legal duty to dispense only prescribed medications. His mistake wasn't about what the law required, but about what drug he was actually giving. Remember: mistake of fact negates intent when the defendant's factual error means they didn't have the mental state required by the statute. Focus on what the defendant was actually confused about—the facts or the law.

Question 7

A defendant was invited to a party at a large house. He became heavily intoxicated. Later in the evening, wanting to lie down, he went upstairs and entered a bedroom where he fell asleep. Unbeknownst to him, the host had told all guests that the upstairs area was private and off-limits. The defendant was later found by the host and charged with criminal trespass, defined as 'knowingly entering or remaining unlawfully on the premises of another.' 'Unlawfully' is defined as being in a place where one is not licensed or privileged to be.

The defendant argues his intoxication should be a defense. What is the strongest reason this defense may fail? Select one.

The defendant's initial entry to the house was lawful, which makes his subsequent trespass a strict liability offense.
The defendant acted recklessly by becoming so intoxicated that he could not understand the host's instructions.
The defendant's mistake about being allowed upstairs was a mistake of law, not fact.
Criminal trespass is a general intent crime, and voluntary intoxication is not a defense to such crimes. (correct answer)

Explanation: When you encounter intoxication defenses in criminal law, the key distinction is between specific intent and general intent crimes. This determines whether voluntary intoxication can serve as a valid defense. Criminal trespass requires only that the defendant "knowingly" entered or remained unlawfully on another's premises. This "knowingly" element makes it a general intent crime - the prosecution need only prove the defendant was aware of his physical actions (entering the bedroom), not that he specifically intended to violate the law or understood the legal consequences. Under established doctrine, voluntary intoxication is not a defense to general intent crimes because defendants are held responsible for the natural and probable consequences of their decision to become intoxicated. Therefore, answer D correctly identifies why the intoxication defense will likely fail. Answer A is incorrect because the lawfulness of initial entry doesn't convert subsequent trespass into a strict liability offense - the statute still requires "knowingly" entering or remaining unlawfully. Answer B incorrectly focuses on recklessness in becoming intoxicated, but the legal standard doesn't depend on whether the defendant's drinking was reckless. Answer C mischaracterizes the situation - the defendant's mistake about whether he could go upstairs was a mistake of fact (whether permission extended to the upstairs), not a mistake of law (misunderstanding what constitutes trespass). Remember this pattern: voluntary intoxication can only negate specific intent (like premeditation in first-degree murder) but never general intent. When you see intoxication defenses, immediately classify the underlying crime's mental state requirement.

Question 8

A statute makes it a felony to 'knowingly possess a controlled substance.' An undercover officer sold a man a bag of white powder, telling him it was legal caffeine powder. In fact, the bag contained cocaine. The man was arrested immediately after the transaction. At trial, the man argues that he genuinely believed the substance was caffeine.

Assuming the jury finds the man's belief to be honest but highly unreasonable, is his mistake of fact a valid defense to the charge? Select one.

Yes, because any mistake of fact that negates the 'knowing' element of the crime is a valid defense. (correct answer)
No, because possession of a controlled substance is a strict liability crime, and mistake of fact is never a defense.
No, because for a general intent crime such as this, a mistake of fact must be reasonable to be a valid defense.
Yes, but only if the jury also finds that the undercover officer's misrepresentation constituted entrapment.

Explanation: The correct answer is A. The statute requires that the defendant 'knowingly' possess a controlled substance. This means the prosecution must prove the defendant knew the nature of the substance he possessed. A mistake of fact, even an unreasonable one, is a defense if it negates the required mental state. If the man genuinely believed he possessed caffeine, he did not 'knowingly' possess a controlled substance. Choice C is incorrect because while 'knowing' possession is a general intent crime, the mistake directly negates that specific knowledge element. Choice B is incorrect because the statute's inclusion of 'knowingly' prevents it from being a strict liability crime. Choice D improperly links the mistake defense to entrapment, which is a separate defense with different elements.

Question 9

The defendant argues his intoxication should be a defense. What is the strongest reason this defense may fail? Select one.

The defendant's initial entry to the house was lawful, which makes his subsequent trespass a strict liability offense.
The defendant acted recklessly by becoming so intoxicated that he could not understand the host's instructions.
The defendant's mistake about being allowed upstairs was a mistake of law, not fact.
Criminal trespass is a general intent crime, and voluntary intoxication is not a defense to such crimes. (correct answer)

Question 10

A statute in a jurisdiction makes it a strict liability offense for a person to 'carry a concealed firearm without a license.' A man's license to carry a concealed firearm expired on his birthday. One week later, genuinely forgetting that his license had expired, he carried his firearm in a concealed manner. He was arrested on an unrelated matter, and the expired license was discovered. He was charged under the statute.

The man argues that his honest mistake about the status of his license should be a defense. Is this argument likely to prevail? Select one.

Yes, because his mistake was one of fact—the current validity of his license—and it negated the criminal intent.
Yes, because his mistake was reasonable, as most people do not track the exact expiration date of their licenses.
No, because his mistake about the legal effectiveness of his license is a mistake of law, which is not a defense.
No, because the offense is strict liability, meaning the defendant's mental state regarding the existence or validity of the license is irrelevant. (correct answer)

Explanation: The correct answer is D. The question states that the offense is strict liability. For strict liability crimes, the prosecution does not need to prove any mens rea with respect to the elements of the offense. The man's belief or knowledge about his license's validity is irrelevant. The act of carrying the concealed firearm without a currently valid license is sufficient for conviction. Choice A is incorrect because for a strict liability crime, negating intent is not a defense. Choice B is incorrect because reasonableness is not the standard. Choice C reaches the right conclusion but for a less precise reason; while the mistake does pertain to legal status, the dispositive factor is that the crime is strict liability, making any mistake defense unavailable.

Question 11

A defendant, enraged and heavily intoxicated, decided to get revenge on a former boss by burning down his office building. The defendant drove to the building, poured gasoline on the front door, and lit it. The fire caused minor damage before it was extinguished. The defendant was apprehended and charged with attempted arson. The jurisdiction defines arson as the 'malicious burning of a building' and defines malice as acting intentionally or with reckless disregard of a known risk. Attempt requires a substantial step and the specific intent to commit the target crime.

The defendant argues his voluntary intoxication should be a defense to the attempted arson charge. Is this argument likely to succeed? Select one.

No, because arson is a general intent crime, and intoxication is not a defense.
No, because the malice required for arson can be established by recklessness, which cannot be negated by voluntary intoxication.
Yes, because attempt is always a specific intent crime, and the defendant's intoxication may have negated his intent to commit arson. (correct answer)
Yes, but only if the intoxication was so extreme that it amounted to unconsciousness.

Explanation: The correct answer is C. Regardless of the mens rea for the completed crime, the crime of attempt always requires the specific intent to bring about the criminal result. In this case, the defendant must have had the specific intent to commit arson. Voluntary intoxication is a defense to specific intent crimes. Therefore, if the defendant's intoxication prevented him from forming the specific intent to burn the building, he cannot be convicted of attempted arson. Choices A and B are incorrect because they analyze the mens rea for completed arson, not the specific intent required for attempt. Choice D states an incorrect, overly restrictive standard.

Question 12

The defendant asserts a mistake of fact defense. What is the likely outcome? Select one.

The defense will succeed because the defendant's honest belief that the gun was unloaded negates the mens rea for battery.
The defense will succeed because a person cannot act 'recklessly' with respect to a risk of which he is unaware.
The defense will fail if the jury finds that the defendant's belief was unreasonable and his conduct was a gross deviation from the standard of care of a reasonable person. (correct answer)
The defense will fail because mistake of fact is not a defense to crimes that result in substantial bodily harm.

Question 13

The man argues that his honest mistake about the status of his license should be a defense. Is this argument likely to prevail? Select one.

Yes, because his mistake was one of fact—the current validity of his license—and it negated the criminal intent.
Yes, because his mistake was reasonable, as most people do not track the exact expiration date of their licenses.
No, because his mistake about the legal effectiveness of his license is a mistake of law, which is not a defense.
No, because the offense is strict liability, meaning the defendant's mental state regarding the existence or validity of the license is irrelevant. (correct answer)

Question 14

A defendant went to an office party where he consumed a large number of alcoholic beverages. Toward the end of the evening, he saw a laptop computer, identical to his own, on a table. Believing it was his, he placed it in his briefcase and left. In fact, the laptop belonged to a coworker. The defendant was later charged with larceny. The jurisdiction defines larceny as the trespassory taking and carrying away of the personal property of another with the intent to permanently deprive the owner of that property.

What is the defendant's strongest argument that he is not guilty of larceny? Select one.

His voluntary intoxication negated the specific intent required for larceny.
His honest mistake of fact, even if influenced by his intoxication, negated the specific intent required for larceny. (correct answer)
His mistake of fact is only a defense if it was a reasonable mistake for a sober person to have made.
His actions did not constitute a 'trespassory taking' because he believed he had a right to take the property.

Explanation: The correct answer is B. Larceny is a specific intent crime, requiring the intent to permanently deprive another of their property. A mistake of fact, whether reasonable or unreasonable, is a defense to a specific intent crime if the mistake negates the required specific intent. Here, the defendant's belief that the laptop was his, however mistaken, shows he did not have the intent to steal. Choice A is less precise; while intoxication may have contributed to his mistake, the mistake of fact itself is the direct defense that negates the mens rea. Choice C incorrectly states the standard for general intent crimes, not specific intent crimes. Choice D conflates the actus reus (trespassory taking) with the mens rea (intent); the taking was trespassory because he had no right to it, and his belief relates to his mental state, not the physical act.

Question 15

A man who recently immigrated to the United States was unaware of federal laws prohibiting the ownership of certain exotic birds. He purchased one such bird from a pet store and kept it in his home. An animal control officer, visiting for an unrelated matter, saw the bird and charged the man under the strict liability statute.

The man argues that he should not be convicted because he was ignorant of the law. Is this a valid defense? Select one.

Yes, because his status as a recent immigrant makes his ignorance of the law reasonable.
Yes, because the crime is not one that is inherently wrongful (malum in se), so a culpable mental state is required.
No, because mistake or ignorance of the law is not a defense, particularly for a strict liability offense. (correct answer)
No, unless the pet store owner explicitly told him that ownership of the bird was legal in the United States.

Explanation: The correct answer is C. The general rule in criminal law is that ignorance of the law is no excuse. This principle applies with particular force to strict liability offenses, which require no proof of mens rea. The defendant's intent and knowledge regarding the law's existence are irrelevant. Choice A is incorrect because the reasonableness of the ignorance is not a recognized exception. Choice B is incorrect because while the malum in se/malum prohibitum distinction is relevant, legislatures can and do create strict liability crimes that are malum prohibitum. Choice D is incorrect because reliance on advice from a private party is not a valid basis for a mistake of law defense.

Question 16

A woman purchased a car from a used car dealer. The title document she received appeared authentic. Three months later, she was pulled over for a broken taillight. A check of the car's VIN revealed it was stolen, and the title was a forgery. The woman was charged under a statute making it a crime to 'receive stolen property, knowing it to be stolen.' The woman claims she had no idea the car was stolen.

To convict the woman, what must the prosecution prove regarding her mental state? Select one.

That a reasonable person in the woman's position would have known the car was stolen.
That the woman had actual, subjective knowledge that the car was stolen. (correct answer)
That the woman was negligent in failing to verify the authenticity of the car's title.
That the woman received the property, as the crime is strict liability with respect to the knowledge element.

Explanation: The correct answer is B. The statute requires that the defendant act 'knowing' the property was stolen. This sets a mens rea standard of actual knowledge. The prosecution must prove that this specific defendant subjectively knew the car was stolen. Evidence of suspicious circumstances (e.g., an unusually low price) could be used to infer knowledge, but the ultimate standard is subjective. A mistake of fact (believing the car was legitimately sold) would be a complete defense. Choice A describes a negligence standard, which is incorrect. Choice C is also a negligence standard. Choice D incorrectly characterizes the crime as strict liability, which is contradicted by the word 'knowing' in the statute.

Question 17

The man argues that he was involuntarily intoxicated because the intoxicating effect was unexpectedly severe. How should his state of intoxication be classified? Select one.

Voluntary, because he knowingly disregarded a warning and consumed two intoxicating substances. (correct answer)
Involuntary, because the severe reaction was a pathological effect of mixing the substances.
Involuntary, because he did not intend to become so severely impaired that he could not drive safely.
Partially voluntary and partially involuntary, requiring the court to apportion his fault.

Question 18

The client argues that his reliance on the accountant's advice constitutes a valid mistake of law defense. How is a court most likely to evaluate this argument? Select one.

The defense will fail because ignorance of the law is not an excuse, and reliance on private counsel does not change this rule.
The defense will fail unless the accountant provided the advice in a signed writing under a formal retainer agreement.
The defense may succeed because a good-faith mistake about the scope of a complex law can negate the 'willfulness' element, which requires a known violation of a legal duty. (correct answer)
The defense may succeed because the accountant becomes a co-conspirator, shifting primary liability away from the client.

Question 19

Assuming the jury finds the man's belief to be honest but highly unreasonable, is his mistake of fact a valid defense to the charge? Select one.

Yes, because any mistake of fact that negates the 'knowing' element of the crime is a valid defense. (correct answer)
No, because possession of a controlled substance is a strict liability crime, and mistake of fact is never a defense.
No, because for a general intent crime such as this, a mistake of fact must be reasonable to be a valid defense.
Yes, but only if the jury also finds that the undercover officer's misrepresentation constituted entrapment.

Question 20

A statute defines criminal trespass as 'knowingly entering or remaining unlawfully in or upon the premises of another.' A hiker became lost in a dense forest during a sudden, unforecasted blizzard. Seeing a small, unoccupied cabin, he broke a window to enter and take shelter from the storm. He was discovered the next morning by the owner and charged with criminal trespass.

The hiker does not deny that he knowingly entered the cabin, which he knew belonged to someone else. What is his best defense? Select one.

The defense of necessity, because his entry was justified to avoid a greater harm from the blizzard. (correct answer)
Mistake of fact, because he did not believe his entry was 'unlawful' under the circumstances.
Mistake of law, because he believed the law allowed for trespassing in an emergency.
Lack of specific intent, because he did not enter with the intent to cause damage or commit a crime inside.

Explanation: This question tests your understanding of criminal defenses, particularly when someone admits to the basic elements of a crime but argues their conduct was justified. When facing criminal charges where the defendant doesn't dispute the facts but claims justification, look for necessity or other justification defenses. The defense of necessity applies when someone commits what would normally be a crime to prevent a greater harm. Here, the hiker knowingly entered someone else's property (satisfying the statute's requirements), but did so to avoid serious bodily harm or death from the blizzard. The law recognizes that preserving human life justifies minor property violations when no reasonable alternatives exist. This makes (A) correct. (B) fails because mistake of fact requires the defendant to be wrong about the actual circumstances. The hiker wasn't mistaken about any facts - he knew exactly what he was doing and why. (C) is incorrect because mistake of law means misunderstanding what the law prohibits, but the hiker likely knew trespassing was generally illegal; he's arguing it was justified, not that he misunderstood the law. (D) misses the mark because the statute only requires "knowingly" entering unlawfully - it's not a specific intent crime requiring intent to commit additional crimes inside. For bar exam criminal law questions, remember that justification defenses like necessity don't deny the crime occurred, but argue it was legally permissible under the circumstances. Always distinguish between defenses that negate an element of the crime versus those that justify otherwise criminal conduct.