What is the unknowing irony in hamlets reply to the ghost?

In Hamlet's reply to the ghost, he expresses a mix of skepticism and a desire for vengeance, stating he will remember the ghost's Words. The irony lies in his intent to seek revenge based on the ghost's claim of murder, while he himself remains oblivious to the deeper implications of his actions and the tragic consequences that will unfold. Hamlet's initial resolve to act contrasts sharply with his later indecision and procrastination, highlighting the tragic complexity of his character.