The doctrine of res judicata as contained in Section 11 of the Code of Civil Procedure, 1908, is based…

Res judicata under section 11 of the Code of Civil Procedure rests on two maxims: no person should be vexed twice for the same cause (nemo debet bis vexari pro una eadem causa), and it is in the public interest that there should be an end to litigation (interest reipublicae ut sit finis litium). The answer is therefore "Both Nemo debet bis vexari pro una eadem causa and Interest reipublicae ut sit finis litium"; either maxim alone is incomplete. Lex non cogit ad impossibilia means that the law does not compel the impossible and is not the basis of res judicata.