this post was submitted on 02 Oct 2025
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Science Memes

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[–] missfrizzle@discuss.tchncs.de 7 points 22 hours ago* (last edited 22 hours ago)

you know, I'm not sure you can have an uncountably infinite number of people. so whatever that abomination is I'll send the trolley down its way. it's probably an SCP.

[–] p3n@lemmy.world 2 points 17 hours ago (1 children)

I do what I always do: run to the trolley, then jump up and pull the emergency stop because I hate false dilemmas.

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[–] _stranger_@lemmy.world 2 points 17 hours ago

It'll make it through maybe 3 infinities before derailing. Go bottom, end it faster.

[–] Randelung@lemmy.world 3 points 20 hours ago

What about a time loop where only one person dies, but infinite times?

[–] LadyAutumn@lemmy.blahaj.zone 10 points 1 day ago* (last edited 1 day ago)

In the top case has it been arbitrarily decided to include space in between the would-be victims? Or is the top a like number line comparison to the bottom? Because if thats the case it becomes relevant if there is one body for every real number unit of distance. (One body at 0.1 meter, and at 0.01 meter, at 0.001, etc)

If so then there's an infinite amount of victims on the first planck length of the bottom track. An infinite number of victims would contain every possible victim. Every single possible person on the first plank length. So on the next planck length would be every possible person again.

Which would mean that the bottom track is actually choosing a universe of perpetual endless suffering and death for every single possible person. The top track would eventually cause infinite suffering but it would take infinite time to get there. The bottom track starts at infinite suffering and extends infinitely in this manner. Every possible version of every possible person dying, forever.

[–] krooklochurm@lemmy.ca 5 points 1 day ago (1 children)

I masturbate until I forget about the decision I have to make and then put off cleaning my apartment until I finally just run out, randomly pull the lever, and never think of the consequences again.

Of course by that point everyone has already starved to death which is the worst possible outcome.

[–] moody@lemmings.world 2 points 22 hours ago

Ah, procrasturbation.

Bottom. Greater probability that it gets stuck in the corpses.

[–] Fleur_@aussie.zone 0 points 13 hours ago (25 children)

You've misunderstood "some infinities are bigger than others." Both of these infinities are the same size. You can show this since each person on the bottom track can be assigned a person from the top track at 1 to 1 ratio. An example of infinities that are different sizes are all whole numbers and all decimal numbers. You cannot assign a whole number to every decimal number.

Matt parker does a good video on this. I can't remember the exact title but if you search "is infinite $20 notes worth more than infinite $1 notes" you should find it.

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[–] Matriks404@lemmy.world 5 points 1 day ago* (last edited 1 day ago) (2 children)

Imagine being the first one being killed on any of these tracks.

The probability of that is...?

Mathematicians tell me, please, because my mind is breaking.

[–] NoneOfUrBusiness@fedia.io 10 points 1 day ago (2 children)

It's 0. I mean someone has to be the first, but betting on any particular person to be the first will necessarily be a losing bet.

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[–] trxxruraxvr@lemmy.world 6 points 1 day ago (3 children)

Doesn't matter, there are not enough people to try this anyway

[–] Thedogdrinkscoffee@lemmy.ca 7 points 1 day ago

Depends on the speed of the trolley.

[–] SpaceNoodle@lemmy.world 7 points 1 day ago

Not with that attitude

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[–] PhAzE@lemmy.ca 2 points 22 hours ago

Geez, disconnect the trains so you can hit both lines at the same time, obviously.

[–] CommissarVulpin@lemmy.world 4 points 1 day ago (6 children)

Okay, so what’s the point of “proving” that there some “infinities” are “bigger” than others? What’s the practical application here? Because an infinite hotel with an infinite number of guests is physically impossible, so I don’t see the point.

[–] carmo55@lemmy.zip 6 points 1 day ago

A practical application is for example in probability theory (or anywhere that deals with measures) such as this question:

If we generate a random real number from 0 to 1, what is the probability that it is rational?

Because we know that the continuum is so much larger in a sense than the set of rationals, we can answer this confidently and say the probability is zero, even though it is theoretically possible for us to get a rational number.

Statistics deals with similar scenarios quite frequently, and without it we wouldn't have the modern scientific method.

[–] NoneOfUrBusiness@fedia.io 5 points 1 day ago

Practical application in math tends to be like three degrees of separation and half a century removed from the math at play. In this case, all of modern mathematics is based on set theory, so it's more that this stuff allows us to do other, more practically useful math while knowing what we're talking about.

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[–] OddMinus1@sh.itjust.works 2 points 23 hours ago

Can I group the people into groups of 1, then 2, then 3 and so forth? When the trolley is done with the killing, it will have killed -1/12 people.

[–] Zerush@lemmy.ml 2 points 1 day ago

I use the lever to kill the train driver.

[–] wildncrazyguy138@fedia.io 3 points 1 day ago

Like everything else in this holographic universe we live in, I’d just close my eyes and believe the bodies I’m trampling are imaginary.

[–] AkatsukiLevi@lemmy.world 3 points 1 day ago (1 children)

Hold the lever halfway so the trolley picks both rails at the same time, to ensure highest possible kill comboq

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