for it entails a contradiction: allowing one of them to inherit from the other assumes he died later, while allowing the other to inherit from him assumes he died earlier, so each would end up both preceding and following the other in death. Accordingly, under the sounder opinion—that there is no reciprocal inheritance—the estate of each deceased person goes only to his heirs who are still alive, excluding any who perished alongside him. This follows the path of certainty and steers clear of doubt. Allah knows best.