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  However, there is a single orthogonally connected group of shaded cells which is treated by the clues as though it does not exist, and it is the strictly largest group of orthogonally connected cells in the puzzle - the "Elephant in the Room", so to speak. For each puzzle, there is exactly one possible solution - that is, the clues uniquely determine the location of every shaded cell in the puzzle, both the cells that are observed by the clues and the cells that make up the elephant.   Not every row or column has a clue.