When Adele sells her house, she does not inform the buyer that the basement leaks during times of heavy rain. This is considered , which is the equivalent of an actual assertion. a tacit admission negligence nondisclosure a unilateral mistake implied confirmation Which of the following is necessary in order to establish that a mutual mistake involving a basic assumption about the subject matter of a contract was made? The mistake involved whether a party could profit from the contract The mistake involved a misunderstanding regarding the applicability of the Uniform Commercial Code (UCC) to the contract The mistake involved whether a party could profit from the contract or whether a party misunderstood the time constraints involved in the contract The mistake involved the existence, quality, or quantity of the items to be exchanged The mistake involved the identity of parties to the contract or whether a party misunderstood the time constraints involved in the contract