one and the same

== English == === Etymology === Possibly a calque of Latin unus et idem. === Pronunciation === === Determiner === one and the same (idiomatic) The selfsame. Used to emphasize the identity or equivalence of two things. === Pronoun === one and the same (idiomatic) The selfsame person or thing. Used to emphasize the identity or equivalence of two things. ==== Translations ====