Learn Italian: Abbiamo letto tutti i documenti, eppure la sua origine è un segreto. - We have read all the documents, and yet her origin is a secret.

While ma works, eppure (and yet) creates a stronger contrast. It highlights a sense of surprise or contradiction: despite having done the thorough work of reading all the documents, the origin remains hidden. It emphasizes that the second fact is unexpected given the first.

Could la sua origine also mean "his origin" or "its origin"?

Yes! In Italian, possessive adjectives like sua agree with the gender and number of the thing being possessed, not the owner. Since origine is a feminine noun, it requires la sua, regardless of whether the secret belongs to a man, a woman, or an object. The English translation says "her" based on outside context.

Origine ends in -e. How can we tell it's a feminine noun here?

The biggest clue is the feminine article and possessive right before it: la sua. While nouns ending in -e can be either masculine or feminine, a helpful rule of thumb is that nouns ending in -igine (like origine or vertigine) are always feminine.

Why do we need the article i in tutti i documenti?