one and the same

Noun

idiomatic

(idiomatic) The same person or thing. Used to emphasize the identity or equivalence of two things.

Japanese Meaning

まさに同一のもの／同一人物、同じ対象を指す / （強調表現として）全く同一であること

When the investigators compared the signatures, they realized the accused and the witness were one and the same.

捜査官が署名を比較したとき、被告と証人がまさに同一人物であることに気づいた。

Sense（1）

(idiomatic) The same person or thing. Used to emphasize the identity or equivalence of two things.

Are the beautiful and the good one and the same?