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It's a Binary Search Tree which doesn't allow repeated values, because every value in the left must be lower than the current root and every value in the right must be higher.
So it will return False.
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Trees: Is This a Binary Search Tree?
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It's a Binary Search Tree which doesn't allow repeated values, because every value in the left must be lower than the current root and every value in the right must be higher.
So it will return False.