That's how you're defining religion? Really? So basically everything in the world that's not science is religion? Is poetry religion? Is law religion? Is mathematics religion? Is my head religion?
Okay, I forgot one vital component - unlike all these other things, the LW's "rationality" tries to define the world from the basics. Like science, but it's not science, it's religion. You know, because it sneers down on science.
So LW is a religion because it:
- is reductionist
- claims to be more effective than science
That is not the definition of religion. Anyway,
this and
this explain how your argument is fallacious. I'm on a broken keyboard and it takes 2s to press the spacekey, so I can't type the explanations out myself.
Relative to the Copenhagen interpretation, it makes no testable predictions.
It doesn't make testable predictions, period. You can't derive probabilities within MWI without resorting to "it behaves exactly like a wave function collapse", and I do mean exactly like it.
Copenhagen and MWI are both
interpretations, and produce exactly the same experimental predictions. You are saying "MWI works just like Copenhagen anyway," but you could also say "Copenhagen works just like MWI anyway."
But in addition to that it creates a whole extra probability-world-sludge that's by definition unobservable and thus makes everything super-complicated for no good reason other than to satisfy people who want to describe probabilistic phenomena in a deterministic fashion. It's a crutch.
But the entire rest of physics is deterministic! Anyway, this is a blatant "my opponent is emotionally/etc. motivated to say this, ergo their point is invalid" argument, also known as Bulverism.
I have an analogy. A spaceship flies beyond the cosmological horizon. The normal laws of physics, applied as usual, say that the spaceship still exists, even though we can't see it. The Copenhagen interpretation says that it disappears.
The existence of other versions of ourselves, and indeed other Earths, is not supposed additionally. We are simply supposing that the same laws govern at all levels, having no reason to suppose differently, and all experimental tests having succeeded so far. The existence of other decoherent Earths is a logical consequence of the simplest generalization that fits all known facts.
Hardly. It's based on the assumption that the quantum laws apply even if you look at them.
Oh okay, so I guess you've also been misguided by a certain Alexander on what "observation" means in the context of Copenhagen's interpretation.
Alexander isn't the same as Yudkowsky. Yudkowsky wrote the Sequences, including the QM sequence.
Observation means interaction. That's it.
Is this about decoherence? Also, why would interaction destroy parts of the wave-function?
Things interact with things and after each time they do the God rolls a bunch of dice for all relevant variables and psi-function distributions according to a giant printed-out chart until he finds a result for all things involved that doesn't break the laws of nature. It's freaking simple, is what it is.
That's not a mechanism! You should just say, "I don't know how the equations work, but they do," not "some magic being is using the equations."
So does MWI!
If it does, then I haven't seen it.
Identical results to Copenhagen.
You think that MWI is unpleasing to the eye? No, Copenhagen is! Sudden discontinuities, branches cut off, laws only applying if you don't look at them... very awful.
I don't think you understand that quantum mechanics is fundamentally built on discontinuities. But - it's in the fucking name! Quantum! Energy of a photon can only take a discrete sets of values (proportional to the Plank's constant), spin can only take certain discrete values, electric charge, color - they're all freaking discrete.
Ahahahahahahahahahaha, this is great. "It's okay to suddenly cut off parts of the wave-function, because spin is discrete." You don't understand the difference between a discontinuity in the wave-function and discrete values for spin. Just because they're named similarly doesn't mean that they're actually physically related.
"We don't know how it works, it just does" is different from "this magic thing happens and all the other branches suddenly disappear."
What "other branches"? There are no "other branches" to speak about! They don't suddenly disappear, because they never existed to begin with!
Ah, you don't think that the wave-function is physically real. Is that it?