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Suppose that you use a < message with instances of a class that is not a
subclass of the Magnitude class, and you have not yet implemented
< for that class:
NotMagnitudeSubClass class definition Object subclass: #NotMagnitudeSubclass instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' Workspace NotMagnitudeSubclass new < NotMagnitudeSubclass new
You would see a screen such as the following, which indicates that the message could not be understood:
