>The Schrödinger's cat is both dead and alive, until an observation is made. 

This is a very misleading  ( and cruel) gedanken experiment, using a cat as a detector for the quantum mechanical behavior of decaying particles.

There is no way one can tag which particle will decay, each has a probability of decaying, and  the cat experiment  stresses the probabilistic nature of quantum mechanics and confuses macroscopic perception with microscopic reality, imo. 

Macroscopic objects have to be treated classically,  composed as they are of order 10^23 wavefunctions which at the cat level are incoherent and therefore classical in behavior.

There is no way to distinguish between [interpretations][1] experimentally. They describe the same data. If they do not, they would not be called interpretations. An interpretation which did not agree with all microscopic measurements would be falsified and no longer be in [the list.][2]


  [1]: https://en.wikipedia.org/wiki/Interpretations_of_quantum_mechanics
  [2]: https://en.wikipedia.org/wiki/Interpretations_of_quantum_mechanics#Summary_of_common_interpretations_of_quantum_mechanics