[Pharo-dev] Does not understand message inconsistency

Why is UndefinedObject version of "did not understand" so different from others? It also inverts the object message paradigm. Thanks Aik-Siong Koh description     "Returns a textual description of the exception (based on the message instance variable). If message is nil, it returns the defaultDescription instead."     message ifNil: [ ^ self defaultDescription ].     message lookupClass == UndefinedObject ifTrue: [         ^ message selector printString , ' was sent to nil' ].     ^ 'Instance of ' , message lookupClass printString       , ' did not understand ' , message selector printString