Why does hamlet need more proof of Claudius wrongdoing How amf why is he skeptical of the ghost?

Hamlet seeks more proof of Claudius's wrongdoing because he grApples with the possibility that the ghost might be a malevolent spirit trying to deceive him into committing murder. He is skeptical of the ghost's authenticity, fearing that it could be a figment of his imagination or a manifestation of his own guilt and grief over his father's death. This cautious approach reflects Hamlet's deep introspection and moral considerations, as he wishes to ensure that he acts justly and not impulsively. Ultimately, he desires certainty before avenging his father's murder.