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An illustration of a task of producing a constant sum (C) of 2 elemental variables, E1 and E2. If a perturbation leads to a change in (E1 + E2), much of the deviation occurs along the UCM. After the perturbation is removed, equifinality is expected in the task space (the system returns to the initial UCM) but not in the {E1; E2} space, resulting in a non-0 deviation along the UCM.
