A comparison between one thing and another, made for the purpose of explanation of clarification. Often refers to the seemingly impossible or surreal for extra emphasis. For example, a task that appears impossible is analogous to obbtanining blood from stone. The success of an implicit analogy in a design is dependent upon the ability of the target audience to interpret exactly what the analogy is. Picture above is a poster created by Sagmeister Inc, that features a headless chicken. This is an analogy for making a lot of effort and noise, but yealding little again.