Donal A. Foley在他的《Understanding MEDJUGORJE - Heavenly Visions or Religious Illusion?》中（p. 221），曾提及過這例子：
To use a concrete example, suppose a person has a $10 bill or a €10 note in their possession. How do they know that it is not counterfeit? Suppose it is believed that forgers have been working in the area, and that there is a possibility that an appreciable amount of forged currency is in circulation. The person has two basic options: they can either take the suspect note to the bank and have it checked, or they can just pass it on to the next person. They might argue that if that person accepts it then they will assume it is good, and if they don't, then they will regard it as a forgery. But that is faulty from a moral perspective. If someone has good reason to believe that a banknote is forged then it is their duty to have it checked.
If we apply this to the question of true and false visions, then it is obvious that checking the note with a bank is like finding out what the official spokesman of the Church - the bishops - have said about a particular vision. But just ignoring the status of the vision and relying on the alleged good fruits is like passing on the note the next time we shop - all that concerns us is whether or not the shop accepts it, and not whether it is forged or genuine. It might be said that a few forged notes in circulation are not going to do much harm, and that is true enough. But if the forgeries reach a certain percentage of the money in circulation then it will start to lose its value - the principle of bad money driving out the good comes into play. If the process goes on unchecked, ultimately the economy of the nation concerned will collapse, because its money will become totally worthless.