Can we Predict Everything?

Einstein didn't like quantum mechanics because it wasn't able to make perfect predictions... but science is not about what you like, it's about what's true!

And twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Thanks to Rob Spekkens and Nima Doroud for contributions and to Perimeter Institute for support.

[samramdebest]

We need the episode that explains how science has proven that there are no hidden classical variables in quantum-mechanics.

[TheMariofan]

leave your umbrella on the street, then come back, 90% of the time its gone...

[joshuarieder]

"God does not play with dice"
That is basically what Einstein said and you so magnificently explained.

[Kyacko]

how much paper do you use every video?

[Francesco_Armillotta]

An ellipse?? it shouldn't be a parabola?

[realscapegoat]

OH GOD, HOW DID I ONLY NOW REALIZE THAT DFTBA STANDS FOR DONT FORGET TO BE AWESOME

[egormatuk]

but someone could steal the umbrella and then the umbrella would be gone.

[GuillaumeMoesching]

About the small comment in the video <<except for the fact that weather is a chaotic system.>>
This comment is not exactly true. If we have all the data about butterflies in the air and all the stuff, we can still predict the weather.
The chaotic principle does not prevent you from predicting stuff. It only makes it a LOT more complicated.

[aarongrooves]

@MinutePhysics: I'd love to see the video of the experiments that "prove" that the universe is non-deterministic. Can you please post them as a video response? I happen to think that the universe is deterministic, but non-local. However, I'm not a physicist. I'm just going by the the most convincing work from physicists that I've read about...

[bitslime]

This video is false, I parked my umbrella and when I had shown up again, it was stolen! WHO JUST DRIVES AWAY WITH SOMEONE ELSE'S UMBRELLA?!

[Therm]

I still actually think that there is a way for us to go deeper. A level below quantum that explains quantum. Randomness cannot exist, only complicatedness, or lower levels to explain it.
Either there is something about quantum mechanics we haven't found yet, or quantum mechanics still isn't the deepest level, or the whole theory is untrue.

[sharathnb]

How on earth do you manage to do your videos. You write so much, and so much goes behind in editing. Really awesome job. Keep up ur great work. You have no idea how many people you are helping out there. 

[sheilajohnson]

Everyones arguing about hidden classical variables and I'm over here all like- "hey look! A MINUS GREEN shirt!!! Yay!" lol

[aditya-lrin]

well.... I'm little late but ball follows a parabola and I'm very sure of it...!

[nishant]

really appreciate the way you explain by diagrams.. It takes so much effort and yet its so easily understandable.

[pranavlimaye]

I left an umbrella on the street 5 days ago






Still haven't found the umbrella

[bencrispe]

This whole video leaves out that even though there is no mathematical model for quantum determinism, the future or every quantum state already exists, since the past present and future all exist on equal footing, and what is perceived as the flow of time is an illusion. So, the only way we could predict quantum states would be to somehow see through time on the quantum level. This may not be as difficult as we think, since we have already conducted experiments that have created small time dilations, such as the airplane clock experiment, so all we need is to observe the quantum states of particles before we put one of them on an airplane, and then dilate time for one of them so that one particle is in the future in relation to the other one. Then we just observe the future particle, and see if the past particle will behave in its future the way the future particle has already behaved.

[carolwagner]

What if the universe randomly chose at random points to be deterministic?

[KFGChris]

0:04 - In projectile geometry every conic section is equivalent to an ellipse. If you throw a ball high enough it will in fact orbit the earth and follow a circular path that is a special ellipse, as is parabola.

[JDNuvo]

Awesome videos! I love learning about Quantum Mechanics! I thought it was cool that you can draw the ideas and talk so well about it. Thanks! Very good work!