"You probably have to have redundant levee systems with canals in between them, like the Dutch have, to make sure that incoming water is channeled off to areas where you deal with it rather than have it drown you."

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Finally, as the digestive canal is a complex system, a series of separate chemical laboratories, I cut the connections between them in order to investigate the course of phenomena in each particular laboratory; thus I resolved the digestive canal into several separate parts.

— Ivan Pavlov