Multiverse theory, I dont like it...

[rolnor]

In think the popular science discussion about multiverse theory has problems. For example, they suggest that in another universe, coffe is green. Problem, coffe in our universe is brown for a reason, it reflects brown light. If it would reflect green light, it must contain other chemical compounds then what is normaly found in coffe. It would be another beverage. And what quantum particles must "move" or "be found in another place" to make the islandic soccer team to win the world cup? Its humans, they have souls, they must decide to train harder, again what electrons must be found in another place to accomplish this? Its all provocing nonsense. Why does the probability to find a quantum particle in another place mean that the asteroid responsible for the dinosaur whipout misses the earth? Even if many many particles was found in a different place, would that mean that the asteroid takes another course? And if everything is possible, then the earth must be made of ice cream in some universe, but ice cream is made by humans? If I have two dice and throw them, maybe two sixes come up. Does that mean that in another universe al the other possible numbers must come up? No, it means that two sixes came up, nothing more. And this theory is not supported by any experiments, no observations. Its just a possible idéa. People like this idéa because its fun for the imagination, nothing more.

 

[Drakkith]

For example, they suggest that in another universe, coffe is green.

MWI does no such thing. It says that every possible outcome of a measurement or interaction is realized in some world or universe. The full ruleset of physical laws is the same in all of these worlds/universes.

And what quantum particles must "move" or "be found in another place" to make the islandic soccer team to win the world cup?

Whichever ones happen to be necessary.

Its humans, they have souls, they must decide to train harder, again what electrons must be found in another place to accomplish this?

There is no evidence for souls, spirits, or anything of the like. Those are entirely within the realm of religion and perhaps philosophy. While consciousness and free will are studied by science, there is still no evidence that they are anything other than the complex actions of fundamental physical laws acting on fundamental particles.

Its all provocing nonsense.

That is your personal opinion. Nothing more.

Why does the probability to find a quantum particle in another place mean that the asteroid responsible for the dinosaur whipout misses the earth?

MWI would say that the outcome of some number of interactions far in the past produced an asteroid of a different size, in a different place, or missing entirely, such that no impact extinction event occurred.

Even if many many particles was found in a different place, would that mean that the asteroid takes another course?

It could mean that a slightly different clump of matter existed during the formation of the solar system, which ultimately became a different asteroid, an asteroid in a different orbit, or no asteroid at all.

And if everything is possible, then the earth must be made of ice cream in some universe, but ice cream is made by humans?

While you might argue that this could occur through random chance (which could conceivably happen in our own universe), the overall idea that something happens by chance which can only happen through human input is not what MWI says.

And this theory is not supported by any experiments, no observations. Its just a possible idéa. People like this idéa because its fun for the imagination, nothing more.

It's important to understand that MWI isn't a theory. It's an interpretation of a theory, just like the Copenhagen interpretation. Interpretations, by definition, cannot be distinguished via experiments. If they could, we could test them and figure out which one is right.

For reference, here is a list of different interpretations of Quantum Mechanics: https://en.wikipedia.org/wiki/Interpretations_of_quantum_mechanics

Being interpretations, you are free to believe whichever one you like. But ranting about how MWI is nonsensical when you don't even know what the interpretation says is not allowed here at PF. Thread locked.