Editing Quid pro quo (section)

== Origins ==
The Latin phrase ''quid pro quo'' originally implied that something had been substituted, meaning "something for something" as in ''I gave you sugar for salt''. Early usage by English speakers followed the original Latin meaning, with occurrences in the 1530s where the term referred to substituting one medicine for another, whether unintentionally or fraudulently.<ref>{{Cite web |title=quid pro quo - Advanced search results in Historical Thesaurus {{!}} Oxford English Dictionary |url=https://www.oed.com/search/advanced/HistoricalThesaurus?textTermText0=quid%20pro%20quo&textTermOpt0=WordPhrase&tl=true |access-date=2023-08-22 |website=www.oed.com}}</ref><ref>{{Cite web |last=Grant |first=Anthony |date=2019-11-25 |title=Quid pro quo: the origins of the Latin term and how its uses evolved in English |url=http://theconversation.com/quid-pro-quo-the-origins-of-the-latin-term-and-how-its-uses-evolved-in-english-127077 |access-date=2023-08-22 |website=The Conversation |language=en}}</ref> By the end of the same century, ''quid pro quo'' evolved into a more current use to describe equivalent exchanges.<ref>{{Cite web|url=http://www.merriam-webster.com/dictionary/quid%20pro%20quo|title=Definition of QUID PRO QUO|website=merriam-webster.com|access-date=2016-10-25}}</ref> 

In 1654, the expression ''quid pro quo'' was used to generally refer to something done for personal gain or with the expectation of reciprocity in the text ''The Reign of King Charles: An History Disposed into Annalls'', with a somewhat positive connotation. It refers to the covenant with Christ as something "that prove not a ''[[nudum pactum]]'', a naked contract, without ''quid pro quo''." Believers in Christ have to do their part in return, namely "foresake the devil and all his works".''<ref>{{Cite book|url=https://archive.org/details/reignofkingcharl01lest|title=The reign of King Charles : an history disposed into annalls|last=L'Estrange|first=Hamon|date=1656-01-01|publisher=London : Printed by F.L. and J.G. for Hen: Seile, Senior and Junior, over against St. Dunstans Church in Fleetstreet, and Edw: Dod, at the Gun in Ivy-lane}}</ref>

''Quid pro quo'' would go on to be used, by English speakers in legal and diplomatic contexts, as an exchange of equally valued goods or services and continues to be today.<ref>{{Cite news|url=https://mises.org/library/understanding-quid-pro-quo|title=Understanding 'Quid Pro Quo'|last=Galles|first=Gary|date=2014-10-22|newspaper=Mises Institute|access-date=2016-10-25}}</ref>

The Latin phrase corresponding to the English usage of ''quid pro quo'' is ''do ut des'' (Latin for "I give, so that you may give").<ref>{{Cite web|url=https://www.merriam-webster.com/dictionary/do%20ut%20des|title=Definition of DO UT DES|website=merriam-webster.com|language=en|access-date=2017-08-16}}</ref> Other languages continue to use ''do ut des'' for this purpose, while ''quid pro quo'' (or its equivalent ''qui pro quo'', as widely used in Italian, French, Spanish and Portuguese) still keeps its original meaning of something being unwittingly mistaken, or erroneously told or understood, instead of something else.