On Aug 28, 10:07 ¨Âí¬ Êïèî Ãáòôåò ¼êïèî®ãáò®®®Àôáéô®ãï®îú¾ ÷òïôåº > To find out what it would be like replace every > ¨Âìáè®îå÷¨áò籬áòç²®®®> with > ¨Âìáè®îå÷¨áò籬áòç²®®®©®æòååúå Almost. From my understanding Immutable objects can have internal changing state as long as it is never exposed to the outside world. For instance, memoize is a good example. Am I right about that? T.