How do we know some particles don't exist until measured?

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In summary, the conversation discusses various interpretations of quantum mechanics and how they explain the existence of particles and their properties. Some interpretations suggest that particles do not exist until measured, while others propose that this is a property of any quantum system. The conversation also mentions the Copenhagen interpretation and the many worlds interpretation and their arguments for particle disappearance. Ultimately, the speaker believes that all interpretations are equal at the level of mathematical calculations. However, there may be fringe cases where different interpretations make different predictions that could potentially be tested in the future.
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The thread seems to leave its initial question more and more, which by its nature must tend to become philosophical anyway if terms like existence or reality are involved. Also "physics is based on math" is definitely another philosophical question which is entirely based on based on. It is a bit like saying English is entirely based on roman letters.

Therefore I'll close the discussion here.
 
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