Hidden defect (or the very nature) of a good or property which of itself is the cause of (or contributes to) its deterioration, damage, or wastage. Such characteristics or defects make the item an unacceptable risk to a carrier or insurer. If the characteristic or defect is not visible, and if the carrier or the insurer has not been warned of it, neither of them may be liable for any claim arising solely out of the inherent vice.