Final answer:
Déjà vu is the feeling of experiencing a current situation as familiar, while retrograde and source amnesia demonstrate memory disruptions.
Explanation:
Déjà vu is the sensation of feeling like you have experienced the current situation before, often linked to past memories closely matching the present experience. Retrograde amnesia is the inability to recall past memories, while source amnesia is when a person cannot remember where a memory came from. These phenomena show how memory processes can be disrupted or influenced by various factors.
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