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Adjective: decidable  di'sI-du-bul
  1. Able to be determined or settled conclusively
    "The outcome of the experiment was decidable based on the collected data"; "The case was deemed decidable by the Supreme Court"
     
  2. (logic, computer science) Capable of being solved or decided by a finite set of rules or operations within a formal system
    "The halting problem is not a decidable problem in computer science"

Encyclopedia: Decidable