> According to this pros and cons list, the “Bissell Pet Hair Eraser Handheld Vacuum” sounds pretty bad. Limited suction power, a short cord, and it’s noisy enough to scare pets? Geez, how is this thing even a best seller?

> Oh wait, this is all completely made up information.

Is it? There's a "Bissell Pet Hair Eraser Handheld Vacuum" with a 16 feet cord. Moreover, although the reviews are largely positive, there are some complaining about noise and limited suction power.

There is also a cordless variant, which I think is what this blog post's author has found, but it's listed under the name as "Bissell Pet Hair Eraser Lithium Ion Cordless Hand Vacuum".

So Bing AI's claims seem justifiable at least. I'm not sure how to confirm whether the citation was correct (full link isn't given in the screenshot).

> A splitting timeline would need a definition of an option, a decision.

This is a reasonable conclusion to reach from the informal description you were given, but (I'd argue) not a valid objection to MWI itself.

Mainstream theories of quantum mechanics share the idea of entanglement and superposition. Think of Schrödinger's cat experiment where a radioactive atom gets in a superposition of "decayed" plus "not decayed", then interacts with the detector so there's a system in the superposition of "decayed & detected" plus "not decayed & not detected", and eventually a superposition of "decayed & detected & cat dead" plus "not decayed & not detected & cat alive".

Copenhagen interpretation says this stops when it interacts with a "classical" observer, which is left undefined, and collapses into one of the possibilities at random. Wigner interpretation says similar, but defines observer as being a consciousness somewhere between a mouse and a dog.

Many-worlds interpretation says there are no "observers" and the whole universe is a quantum system. Consequence of this is that entanglement "bubbles up" until the entire universe is in a superposition. There's no definition of "choices" or even "worlds" being relied on.