All people know a little history of the United States may know the first sentence of the declaration of independence of United States is " All men are created equal " , to reflect the quality of Toyota is better than others. Because of the declaration of independence to americans is well-known, when americans see this AD,they will have the familiarity, the familiarity makes target audience paying minimum effort when cognize the AD, the declaration of independence in the minds of americans is noble, the AD used the first sentence, let target audience heartfelt like to achieve best contextual effect. This is the formation of optimal relevance. No doubt the AD was successful.