inefficiency often creates redundancy, but they are not synonyms. Redundancy may be inefficient, but you can also build redundant systems that looking at from

inefficiency often creates redundancy, but they are not synonyms. Redundancy may be inefficient, but you can also build redundant systems that looking at from a micro perspective seem inefficient but what you see is only a local inefficiency; if you distribute their effects far enough in space and time you find that they are actually at a macro scale more efficient than not having them because they prevent breakdowns that destroy all the smaller systems held within the bigger one.