The ghost of Hamlet’s father haunts him as do the ghosts of Europe that haunt Valery’s writing. It is safe to surmise that ghosts are a symbol of uncertainty.
The Ghost of Old Hamlet haunts the castle of Elsinore. Old Hamlet was murdered by his brother, and he wanders the night, expecting to have chance to speak with his son. One he coulf, he orders Hamlet to revenge his murder
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However, the ghost in Hamlet's story is sometimes believed to be an evil spirit who has taken on Old Hamlet’s shape to wreak havoc on Denmark.
Cliques are groups of friends, but not all groups of friends are cliques. The thing that makes a group a clique (say: KLIK) is that they leave some kids out on purpose. They form groups that they won't let other kids belong to. Sometimes kids in the clique are mean to kids they think are on the outside. Usually one or two popular kids control who gets to be in the clique and who gets left out.