 Yet another way of finding markers of consciousness is to ask what consciousness is for—the function of consciousness. In their book The Evolution of the Sensitive Soul, Simona Ginsburg and Eva Jablonka (2019) propose that consciousness evolved with the development of a capacity for an open-ended kind of learning they call Unlimited Associative Learning (UAL), originating in the Cambrian era. UAL permits organisms to assign value to new and complex stimuli, to remember the associations with these stimuli, and to use those memories to make decisions in the future.