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Why is it not possible to use a dummy node in an SLList to avoid all the special cases that occur in the operations push(x),

Why is it not possible to use a dummy node in an SLList to avoid all the special cases that occur in the operations push(x), pop(), add(x), and remove(). this is a homework question in Computer Science. I noted in my notes dummy node eliminates need for special cases using a DLList

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