Yes, I agree that it sounds great. But, it does not mean that you really have to use this property. It was not necessary for the task, this is the point.. Well

Yes, I agree that it sounds great. But, it does not mean that you really have to use this property. It was not necessary for the task, this is the point.. Well, in general, modular code should not make assumptions about other parts of the program (when possible). You know, if the function is idempotent by definiiton, it does not mean that its implementation is. Unicode is changing too, new symbols are added.