The Civil Code provides if the law or contract does not state the diligence which is to be observed in the performance, that which is expected of a good father of a family shall be required. And any stipulation reducing the diligence required is void, because it is contrary to public policy. This however, talks about common carriers.
Can two parties, wherein the contract entered into is not one of a common carrier, stipulate to reduce the diligence required to that of "slight diligence", and that it would mean that it is the diligence lower than that of a good father of a family?