Researcher: Some scholars maintain that the first government other than China to issue any form of paper currency was the Massachusetts colony in 1690.
Conclusion
The scholars who say Massachusetts (1690) was the first non-Chinese government to issue paper currency are wrong.
Evidence
In 1685, New France assigned official value to playing cards and issued them as pay to soldiers, convertible to coin later. So New France did this five years before Massachusetts.
Evaluate
The scholars' claim is specifically about paper currency. To refute them, the New France case must qualify as paper currency. Playing cards function as currency in the stimulus (assigned value, used to pay soldiers, convertible to coin), but for the conclusion to follow, the playing cards have to also be made of paper. Without that, the New France case might not be a "paper currency" example, and the scholars' claim could survive.
Goal
Find the assumption that makes the New France playing cards qualify as paper currency — i.e., that the cards were made of paper.