What is the significant scientific hurdle associated with the Many-Worlds Interpretation (MWI)?
Answer
It is fundamentally unfalsifiable if the alternate worlds are completely separate and non-intersecting.
A key requirement of scientific theories is falsifiability—the possibility of proving them wrong through observation or experiment. Because the worlds posited by MWI are separate and non-intersecting, finding evidence against their existence is impossible, challenging the core of scientific methodology.
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