Editor's prefatory comment:
The following information was introduced in the preceding article on “the 20+ interpretations of QM.” However, the central issue is so important that it needs to be highlighted.
That central issue has to do with the nature of the wave function: Is it a mathematical construct, mere information, or is it something “real” in the 3-D world? The competing versions speaking against Copenhagen assert that the wave function is a real entity.
To better understand the debate, one will need a working knowledge of the definition of “wave function.”
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