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You are speaking of quantum effects. I am not an experimental type, and those who are may correct me, but for planetary orbits...

I am sure the wavefunction is not real but complex-valued :oldbiggrin:

Lovely, this is history thread material.

Two off topic posts have been deleted. All users, please use the Report button if you think a post violates the PF rules. Do not post...

https://arxiv.org/abs/2602.09397 "historical debates over the physical reality of the wave functions", J.Barandes

IMO, we can talk about this without invoking QM. The QM wave function is related to the probabilities of a particle being in a certain...

And we say that to stop ourselves from making claims about what's "real" that aren't justified by the fact that we can use the equations...

But that doesn't make every variable in the equation we use to predict the outcome real. So I'm not following your logic here. See above.

When speaking about reality as a concept, I like to keep in mind the first few chapters of Feynman's Lectures. Here he talks about a...

"Density Matrix Realism" by Eddy Keming Chen (https://arxiv.org/abs/2405.01025)

Are the probabilities of the Black–Scholes model real? Thanks Bill

But that doesn't mean variables used in equations are real. Equations and their variables are mathematical tools we use to make...

It can't be real, only a very good approximation to something that many think of as real. That is because the current best theory we...

My opinion: I don't care. See, that's why @PeterDonis wrote:

Physics is not about opinions. Different QM interpretations say different, and mutually inconsistent, things about what the wave...