LessonsBab al-Sarf: Mixed Currency Exchanges, Debased Coins and ObsolescenceQuiz

The agreement stipulated a circulating form of payment. Before performance, it entirely ceased to circulate, altering the monetary property underlying the agreed price. In the position stated by Abu Hanifah, the original sale does not persist.
If goods were never delivered, the parties do not proceed on that failed sale. If goods have been taken or consumed, further restitution or liability questions arise; 'nothing is owed' would be an incorrect simplification.

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Why Abu Hanifah regards the sale as failed

Bab al-Sarf: Mixed Currency Exchanges, Debased Coins and Obsolescence

The agreement stipulated a circulating form of payment. Before performance, it entirely ceased to circulate, altering the monetary property underlying the agreed price. In the position stated by Abu Hanifah, the original sale does not persist.
If goods were never delivered, the parties do not proceed on that failed sale. If goods have been taken or consumed, further restitution or liability questions arise; 'nothing is owed' would be an incorrect simplification.