[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 85 KB, 426x341, gt+be+in+third+grade+gt+sweet+mother+of+blond+_5f9a764ba5698a0134ef228d826f16af.jpg [View same] [iqdb] [saucenao] [google]
8542040 No.8542040 [Reply] [Original]

Do probabilities actually exist?
Like if I say there is a 50% chance it will rain tomorrow, what does it even actually mean?
It's not like there is going to be tons of "tomorrow" out of which half of them will be rainy

>> No.8542071

In a deterministic universe there technically is no probability. It's only what we are unable to measure. Our current interpretation of QM does give probability and non-determinism as a property of the universe. However quantum events rarely affect anything we want to measure, like weather. Your weather prediction is based on imperfect measurements so it needs error factored in.

>> No.8542077

>>8542040
Every event has a 50% chance of occurring. Either it happens or it does not. :)

>> No.8542082

>>8542071
>However quantum events rarely affect anything we want to measure
don't they fundamentally affect EVERYTHING on every scale?

>> No.8542090

>>8542040
That means you don't know whether it will rain or not, and if you were to guess 100 time, you'd be correct 50.

>> No.8542094
File: 115 KB, 415x292, 1464743015945.png [View same] [iqdb] [saucenao] [google]
8542094

>>8542077
d-deep

>> No.8542097

>>8542082
No. Each particle is like a dice roll. When you roll trillions of dice, you can be very confident in the probability distribution.

>> No.8542099

>>8542077
mind=blown

>> No.8542101

>>8542077
This means that there is a 50% chance that an event has a 50% chance of happening and a 50% chance of not happening.

Then what is the other 50%?????

>> No.8542128

>>8542040
When asking whether a mathematical idea we use to describe aspects of reality really does exist, the answer is always no. Mathematics are an abstract concept, they can only exist as such.

>> No.8542157
File: 14 KB, 342x430, images (1).png [View same] [iqdb] [saucenao] [google]
8542157

>>8542101
>The amount of physics majors that will never have a place in academia

>> No.8544743

>>8542077
So that means there's a 50% chance of me dying tomorrow?

>> No.8545301

>>8542090

You can't prove that so its not science.