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So, it is not unreasonable to use the everyday word of DISORDER
to explain the meaning of the scientific word ENTROPY. The difficulty
lies in the fact that the word DISORDER is not very well defined.
Indeed, DISORDER refers really to the INFORMATION we have about
the system. Example: If you take a deck of cards, and have no idea of
its previous history, and you should guess which is the third card
from the top, then you have no idea of the correct answer and any
guess is as good as any other. AND THIS REMAINS TRUE even if the
deck of cards is perfectly ordered as it came from the factory.
This because you DON'T KNOW IT. So, don't tell me that everybody has
a CLEAR IDEA of what ORDER and DISORDER means in common language.
It is such a discussion which we should have with students when
trying to make them understand the concept of entropy.