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thumb|upright=0.80|Dante Gabriel Rossetti, How They Met Themselves, watercolour, 1864
thumb|upright=0.80|Dante Gabriel Rossetti, How They Met Themselves, watercolour, 1864
A doppelgänger ( , also doppelgaenger and doppelganger) is a supernatural double of a living person, especially one who haunts the doubled person.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).