Those who are immersed in a field have an established view of what is possible, based on some combination of previous successes, citation bias, current limits of knowledge, and truth – and it is often difficult to distinguish these sources. But the newcomer asking the most basic questions begins to notice logical inconsistencies, from which the real constraints on solutions and technological limits arise.
不受课题特有教条限制的开放心态是这种方法最基本的要求。因为来源往往很难分清，所以此前的成功、引用偏好、目前的知识局限和公理让圈内人对“可能”的定义产生了约定俗成的认识。但从最基本问题出发的新人能够一眼发现逻辑上的不一致，而正是这些不一致限制了问题的解决。