〈 Berger | Dillon 〉

Elon, I beg you. We have worked so hard to get rid of the quantum woo peddling `only when you look' nonsense for so long. In a single tweet you have ruined ithttps://twitter.com/elonmusk/status/1205230908837523456 …

Sounds like a flimsy analogy but not too egregious imo From Wiki article on Copenhagen interpretation: "physical systems generally do not have definite properties prior to being measured" (maybe he should've said measured vs. observed?) Then again you're the physicist

yes he should have said measured instead

Even then... to many people, the term 'measurement' without further qualification is still associated too strongly with Copenhagen interpretation 'observer' issues. Perhaps better to just go straight to decoherence.

Decoherence alone doesn't solve the problem. It simply zeroes all entanglement in a basis that depends on the measurement. It doesn't however say why we observe only ONE specific eigenvalue (for a single event) rather than a weighted average or distribution of all of them.

right but the point is *that* we only observe a single eigenvalue that is interpretation independent

That we observe a single eigenvalue isn't what interpretations are about. Interpretations try to explain WHY we do. Which is the whole problem.