The following is a translation from an Arabic Q&A. Question: The following came in the Book of the Economic System , p. 268, the sixth line: "If a man bought a true dinar by two forged dinars it is not permissible" It also came in p. 289, line 12 in the same book ‘and the exchange rate between the two States is then the ratio between the weight of the pure gold in the currency of the first State and the weight of the pure gold in the currency of the second State " I understood from the text mentioned in the first place and the subsequent clarification that it is not allowed to exchange the forged two dinars by a true dinar though the pure gold contained in the two forged dinars might be equal to the weight of pure gold in the true dinar. Therefore, the understanding I got is that when you exchange the gold of 24 carats with gold of 21 carats, for example exchange will not be except by weight for weight despite the different proportion of pure gold in
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