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
- 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
- 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?