complex domain represents the "unknown unknowns". Cause and effect can only be deduced in retrospect, and there are no right answers. "Instructive patterns ... can emerge," write Snowden and Boone, "if the leader conducts experiments that are safe to fail." Cynefin calls this process "probe–sense–respond". Hard insurance cases are one example. "Hard cases ... need human underwriters," Stewart writes, "and the best all do the same thing: Dump the file and spread out the contents." Stewart identifies battlefields, markets, ecosystems and corporate cultures as complex systems that are "impervious to a reductionist, take-it-apart-and-see-how-it-works approach, because your very actions change the situation in unpredictable ways." Chaotic In the chaotic domain, cause and effect are unclear. Events in this domain are "too confusing to wait for a knowledge-based response", writes Patrick Lambe. "Action—any action—is the first and only way to respond appropriately." In this context, managers "act–sense–respond": act to establish order; sense where stability lies; respond to turn the chaotic into the complex. Snowden and Boone write: In the chaotic domain, a leader’s immediate job is not to discover patterns but to staunch the bleeding. A leader must first act to establish order, then sense where stability is present and from where it is absent, and then respond by working to transform the situation from chaos to complexity, where the identification of emerging patterns can both help prevent future crises and discern new opportunities. Communication of the most direct top-down or broadcast kind is imperative; there’s simply no time to ask for input. The September 11 attacks were an example of the chaotic category. Stewart offers others: "the firefighter whose gut makes him turn left or the trader who instinctively sells when the news about the stock seems too good to be true." One crisis executive said of the collapse of Enron: "People were afraid. ... Decision-making was paralyzed. ... You've got to be quick and decisive—make little steps you know will succeed, so you can begin to tell a story that makes sense." Snowden and Boone give the example of the 1993 Brown's Chicken massacre in Palatine, Illinois—when robbers murdered seven employees in Brown's Chicken and Pasta restaurant—as a situation in which local police faced all the domains. Deputy Police Chief Walt Gasior had to act immediately to stem the early panic (chaotic), while keeping the department running (simple), calling in experts (complicated), and maintaining community confidence in the following weeks