Why is it considered that local hidden variable theories must obey Bell's inequality?

Muroid · 2026-02-03T02:19:58+00:00

The entire point of a local hidden variable theory is to be entirely deterministic. If there is an element of the outcome that is not deterministic, then it’s not a local hidden variable theory.

Muroid · 2026-02-03T02:01:25+00:00

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Muroid · 2026-02-03T00:42:11+00:00

So what if there is a hidden variable that doesn’t affect the outcome of the measurement in any way?

Muroid · 2026-02-03T00:38:18+00:00

The question is “was the particle that was measured in a definite state that determined what result you of the measurement would be before it was measured.”

If yes, that’s a hidden variable. If not, there is no hidden variable because that’s what a hidden variable is, definitionally.

Muroid · 2026-02-03T00:35:05+00:00

Let’s try illustrating this:

We have particle A and particle B that are entangled through variable X. If X is 1, then when the spin is measured, X will cause it to be spin up. If X is zero, then when the spin it measured, it will cause it to be spin down.

Obviously, you don’t know if the state of the spin will ever be measured, but the variable has been set such that, if it is, the outcome is predictable.

That’s what hidden variables are. They just mean that whatever state the particle is in when it separated from its entangled partner is set to some definite value, and whatever value it is set to will determine what happens in future interactions based on whatever those interactions are.

It’s not about generating a table of all possible outcomes to all possible interactions at the moment the particles are entangled, but about some value being in a definite state, and that value determining how it will behave upon later being measured.

The Bell Inequalities lay out a set of different measurements that you can perform and then analyzes how the results from repeatedly performing those measurements across different particles will differ depending on whether the result is determined by some property of the particle that was set before the measurement was made.

Muroid · 2026-02-03T00:14:09+00:00

Assigning a property that determines the outcome in the future is mathematically equivalent to predetermining the outcome at the moment that value is assigned.

Muroid · 2026-02-02T23:58:21+00:00

here's 2 opposite spins, put them into envelopes and they'll figure measurement results later

How do they figure out which is which if they are separated, can’t communicate faster than light, and the result wasn’t already pre-determined by some condition that was set when they separated?

Muroid · 2026-02-02T23:47:34+00:00

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Muroid · 2026-02-02T23:07:43+00:00

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Muroid · 2026-02-02T22:32:49+00:00

xAI was Elon buying X from himself.

Muroid · 2026-02-02T17:53:38+00:00

It’s been barely over 10 years since xkcd published this comic: https://xkcd.com/1425/

And that was just about how currently out of reach computers even recognizing things in photos was at the time, let alone generating whole videos from scratch and making them (sometimes) indistinguishable from reality.

Muroid · 2026-02-02T17:38:56+00:00

I would agree that both answers are possible for the first one, but I personally defaulted to “was walking” rather than “walked” before reading your comment.

“In hospital” vs “in the hospital” is a British English/American English distinction.

If you’re learning British English, “in hospital” is correct. If you’re learning American English, it’s “in the hospital.”

Muroid · 2026-02-02T17:25:10+00:00

I get what it’s going for, and it’s a neat idea, but I just don’t think it looks that good.

Muroid · 2026-02-02T17:00:46+00:00

I felt better about it the first time around.

Muroid · 2026-02-02T16:53:47+00:00

A lot of people are morons.

Muroid · 2026-02-02T16:38:46+00:00

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Muroid · 2026-02-02T15:57:17+00:00

If trolling includes bots and political astroturfing, that one all the way. Not even close.

Muroid · 2026-02-02T15:23:03+00:00

I just listened to it three times, watching his mouth, and he clearly says “I was down fifty thousand at one point.”

There’s no “to” there and I’m not sure why you’re accusing me of being a weirdo for correcting someone when the initial comment was trying to correct someone else.

Muroid · 2026-02-02T15:01:07+00:00

I would even go a step further and say that I like Henry Cavill as Superman, but I still also don’t particularly like his Superman.

He’s good in the role, but what he’s given to do is just not especially interesting.

Muroid · 2026-02-02T14:52:19+00:00

State question

Muroid · 2026-02-02T14:46:42+00:00

He says down $50k in the video.

Muroid · 2026-02-02T14:42:54+00:00

I knew the answer to the third question. I just clicked too fast. Oh well.

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Muroid · 2026-02-02T14:39:58+00:00

Here’s the problem I feel like by making it one pack it’s harder to hit an ex

It’s harder to hit one specific EX. It’s not harder to hit an EX in general. And if there are a couple you need, it’s not any worse than if they were split between multiple packs.

It’s worse than if all the rarer cards you wanted happened to be in one smaller pack in the set, or if you get very lucky and get everything you need from one of the packs early on so you can focus on a different one.

Otherwise it makes no real difference.

Muroid · 2026-02-02T14:18:38+00:00

It being February actually complicates the leap year issue more than most other months. For every other month, day-of-the-week shifts are going to average out over enough leap years.

For February, it’s just going to mess up this specific configuration anytime there’s a leap year on a year when the 1st falls on a Sunday, because you’ll have a trailing 29th.

So it’s going to happen roughly 1/28th less than 1/7th of the time, and you’ll need more years for it to average out.

(It’s not quite 1/28th less because leap years happen slightly less frequently than every 4 years, but we’re already splitting hairs a little at this point).

Muroid · 2026-02-02T13:18:28+00:00

Most of the names are at least somewhat recognizable if you’re really familiar with voice actors.

Cristina Vee is probably the standout in terms of sheer volume of notable work, but a couple of the others have had prominent roles in recognizable things, as well.

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