Question: Write a prolog program for double (List,ListList), where every element [in List appears twice in ListList, e.g., double([1,2,3] [1,1,2, 2,3,3]) is true.
Write a prolog program for double (List,ListList), where every element [in List appears twice in ListList, e.g., double([1,2,3] [1,1,2, 2,3,3]) is true.
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