a

A debtor is liable:
1. When laws improvised
2. agreement of the party
3. Nature of the obligation requires assumption of risk
4. negligence of the debtor conquer Fortuitous event
5. Involves generic thing
6. Civil act conquer criminal act

Emphasized topics:
Chapter 1 Obligations
Meaning of "prestation" pg. 19
Sources of Obligation pg. 21-23
Types of Quasi-Contracts pg. 26-27
Chapter 2 Nature of Oblligations
Accesions & Accessories pg. 43
Kinds of Delay pg. 47-53
Acts of God and Man;Force Majeure pg 65-67
Chapter 3 Different kinds of Obligation
Pure and Conditional Obligation pg 79-82
Potestative pg. 85
Reciprocal Obligations 105-110
Facultative and Alternative Obligation pg. 129-130
Coverage pg Chapter 1 up to Penal Clause pg. 17-190