If a wise man should inadvertently accept counterfeit money for good, will he offer it as genuine in payment of a debt after he discovers his mistake?
 Marcus Tullius Cicero, On Duties (44 BC). copy citation

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Author Marcus Tullius Cicero
Source On Duties
Topic payment money
Date 44 BC
Language English
Reference
Note Translated by Walter Miller
Weblink http://www.constitution.org/rom/de_officiis.htm

Context

“If that accomplishes nothing, he will take him to task; he will even threaten; and in the end, if things point to the destruction of the state, he will sacrifice his father to the safety of his country." {91} Again he raises the question: "If a wise man should inadvertently accept counterfeit money for good, will he offer it as genuine in payment of a debt after he discovers his mistake?" Diogenes says, "Yes," Antipater, "No," and I agree with him. If a man knowingly offers for sale wine that is spoiling, ought he to tell his customers? Diogenes thinks that it is not required; Antipater holds that an honest man would do so.” source