Which defense asserts a party lacked the mental capacity to understand the nature of the contract at formation?

Which defense asserts a party lacked the mental capacity to understand the nature of the contract at formation?

• A. Incapacity
• B. Duress
• C. Mistake
• D. Misrepresentation

Answer: (A)

Lack of mental capacity to understand the contract's nature and consequences at the moment of formation is incapacity. Because forming a contract requires the parties to grasp what they are agreeing to, someone who cannot understand its nature cannot give truly informed consent, so the contract is voidable at that party's option. This defense is about the person's ability to comprehend the agreement itself, not about coercion, factual errors, or deceptive statements. Duress would involve threats that override free will, not a lack of understanding. Mistake centers on incorrect beliefs about facts at the time of contracting. Misrepresentation involves a false statement that induces the contract. Incapacity specifically targets the mental understanding of the contract, which is why it is the correct defense here.

Lack of mental capacity to understand the contract's nature and consequences at the moment of formation is incapacity. Because forming a contract requires the parties to grasp what they are agreeing to, someone who cannot understand its nature cannot give truly informed consent, so the contract is voidable at that party's option. This defense is about the person's ability to comprehend the agreement itself, not about coercion, factual errors, or deceptive statements.

Duress would involve threats that override free will, not a lack of understanding. Mistake centers on incorrect beliefs about facts at the time of contracting. Misrepresentation involves a false statement that induces the contract. Incapacity specifically targets the mental understanding of the contract, which is why it is the correct defense here.