On 02 Jan 2014, at 19:07, Jason Resch wrote:

There are other reasons to prefer it [MWI] besides it's answer to the measurement problem without magical observers, including:

- Fewer assumptions

Which is nice, because the SWE+collapse is not even consistent, as it never explains why QM is false on observers.

- Explains more (appearance of collapse, and arguably also the Born rule (with Gleason's theorem))
- Explains how quantum computers work
- Fully mathematical theory (no fuzziness, or loose definitions)
- No faster-than-light influences

Which is nice, as it is covariant, and makes QM usable in cosmology, as it *is* actually used today.

- Explains universe at times before there was conscious life to observe it
- Preserves CPT symmetry, time reversibility, linearity
- Is realist on things other than our observations (here is "something else" out there, besides what is in our minds)

QM without MWI is QM + ad hoc instrumentalist magic.

You forget one nice point with MWI. It confirms computationalism (which is the least magical theory of mind). In fact MWI confirms COMP + NON-solipsism, as it shows the existence of a first person plural: the contagion of superposition ensures that the entire population of communicating observers are duplicated/ multiplied, and that gives the first person plural.

The MWI confirms also Einstein's intuition on QM: God does not play with dice, and there are no spooky actions at a distance.



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