one and the same

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one and the same

Where it comes from

Possibly a calque of Latin unus et idem.

determiner

  1. idiomatic The selfsame. Used to emphasize the identity or equivalence of two things. It's almost as if there's one electron in two places at one and the same time.

pronoun

  1. idiomatic The selfsame person or thing. Used to emphasize the identity or equivalence of two things. Are the beautiful and the good one and the same?

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