Your time would be better spent if you studied real money. After you knew what real money looked like, you could recognize a counterfeit.
The "counterfeit money" example relies upon hidden assumptions.
One assumption is that one has already been provided a description of what "real" money looks like.
What would a person do if they did not already possess such a "description"?
And consider this variation.
Suppose a person was presented with official paper currency from Canada, the United States, the United Kingdom, China, India, and Japan. Which bills in this situation would be "real" and which would be "counterfeit"?
The book's illustration breaks down and crumbles very easily.