[IDEM libro septimo decimo digestorum. ] §50.17.188.prUbi pugnantia inter se in testamento iuberentur, neutrum ratum est.
[THE SAME, in the seventeenth book of the Digests.] Where contradictory provisions are ordered in a will, neither is valid.
§50.17.188.1Quae rerum natura prohibentur, nulla lege confirmata sunt.
Things which are forbidden by the nature of things are confirmed by no law.