On: Is Quantum Theory About Reality or What We Know?

[naasking]

> Copenhagenism is falsifiable. It says that "large" things are classical and can't be put in superpositions.

Copenhagen doesn't say that. See for instance, Schrodinger's cat.

[akvadrako → naasking]

The biggest problem with Copenhagen is that it doesn't say if there is a physical collapse or that there isn't one. Instead think of it as a rule of thumb; if you apply the quantum/classical cut in the appropriate spot for your experiment, it will give the right answer. But it gives no guidance where that spot is or what physically is happening.

[justinpombrio → akvadrako]

From the many worlds perspective, it's actually quite clear where the Copenhagen "collapse" occurs: it's when something enters a superposition with Earth.

[akvadrako → justinpombrio]

It is true that WMI gives clear guidance on the subjective collapse, but there is nothing special about Earth.