Steven McDougal was involved in an automobile accident with an uninsured motorist. McDougal was insured with Metropolitan Insurance Co., although he did not have a copy of his insurance policy. McDougal and Metropolitan entered into settlement negotiations, during which McDougal told Metropolitan that he did not have a copy of his policy. Ultimately, McDougal agreed to settle all claims for $15,000 which was considerably less than his actual damages. In a letter to Metropolitan McDougal stated that $15,000 was the "sum you have represented to be the ... policy limits applicable to this claim." After signing a release, McDougal learned that the policy limits were actually $250,000, and he refused to accept the settlement proceeds. On what basis can McDougal avoid the contract? Specifically state the rule or contract law principal that applies to this case. Discuss