"underconstrainedness" meaning in English

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  "lang_code": "en",
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          "ref": "1992, Ed. Mongi Abidi, Rafael Gonzalez, Data Fusion in Robotics & Machine Intelligence, page 146:",
          "text": "[...] the underconstrainedness of the sensor data is handled instead by the use of active perception strategies to resolve sensor ambiguity and uncertainty.",
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        "The state or quality of being underconstrained"
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