A mental incompetent lacks capacity for sign a contract because he can not understand fully the legal consequences of a contract. Voidable contracts are void contracts. Contracts made for an illegal purpose are voidable contracts. A unilateral contract is not based on consideration and therefore is not binding.
Performance is the only way to terminate a contractual relationship.
Delayed performance is regarded as substantial performance. Legal remedies do not include consequential damages. The law of contract not allow consequential damages. The law of contract not provide for punitive damages. Liquidated damages clauses in contracts are strictly enforced.