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The problem with encapsulation is that invariably you will think something is an internal detail, and "protect" it. Later, I will come along and want to use your code to do something you did not envision, and the "protected" status of some part of your code will greatly complicate my life. I don't have a problem with separate name-spaces for "public" code versus "implementation" code, but limiting my ability to re-use implementation code is just plain wrong.

Ultimately, if someone uses something that is part of a transient namespace, they are responsible if it breaks at a later time. You should not handcuff everyone to save stupid people from themselves; stupid people will always find a way to shoot themselves in the foot.

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