responsibility for quasi-delict is not demandable together with the civil liability arising from a criminal offense. (Art. 2177.)

The provision you mentioned is from the Civil Code of the Philippines, specifically Article 2177 under Title XVIII on "Quasi-Delicts".

This article states that: "Responsibility for fault or negligence under the preceding article is entirely separate and distinct from the civil liability arising from negligence under the Penal Code. But the plaintiff cannot recover damages twice for the same act or omission of the defendant."

In simpler terms, this means that a person cannot be held liable for both a quasi-delict (a civil offense) and a criminal offense for the same act. They are separate and distinct from each other. If a person is found guilty of a criminal offense, they cannot also be sued for a quasi-delict for the same act. Similarly, if a person is found liable for a quasi-delict, they cannot also be prosecuted for a criminal offense for the same act. This is to prevent "double jeopardy" or being punished twice for the same offense.