No disrespect to David Deutsch, but every time I try to make sense of constructor theory I run into objections like “there are solutions to the Einstein equations, like Godel universe and Kerr black hole, that contain closed timelike curves and so are not derivable with any constructor… meaning they are “impossible”. But one can happily solve the covariant version, not the ADM-decomposed version and find these solutions without any transformations required by the constructor theory.” I might be missing something here… on the other hand, Deutsch insists that the double-slit experiment is evidence of MWI (it’s not), so some skepticism is warranted.
No disrespect to David Deutsch, but every time I try to make sense of constructor theory I run into objections like “there are solutions to the Einstein equations, like Godel universe and Kerr black hole, that contain closed timelike curves and so are not derivable with any constructor… meaning they are “impossible”. But one can happily solve the covariant version, not the ADM-decomposed version and find these solutions without any transformations required by the constructor theory.” I might be missing something here… on the other hand, Deutsch insists that the double-slit experiment is evidence of MWI (it’s not), so some skepticism is warranted.