the air, and it'll fall along an ellipse; leave your umbrella parked on the street,

的空氣，它'會沿著橢圓落下;離開你的傘停在街上。

and when you come back, it's still there, just one umbrella.

而當你回來的時候，它'還在，只是一把傘。

Quantum physics is not like this - because quantum mechanics doesn't allow us to make

量子物理學並不是這樣的--因為量子力學不允許我們做。

absolute predictions about the future. It only predicts the likelihoods of different

對未來的絕對預測。它只預測了不同的可能性。

outcomes to happen, and doesn't say anything about which one will happen. "Well," you might

say, "that's the same with the weather - the weatherman only tells you what the chance

說，"那'的天氣一樣--天氣預報員只告訴你什麼機會

of rain is; he can't tell you whether or not it will rain."

的雨是；他不能告訴你是否會下雨.&quot。

But maybe the weatherman just doesn't have good enough knowledge of exactly where all

但也許天氣預報員只是沒有足夠的知識，到底在哪裡所有的

of the air and water molecules in the world are, nor a good enough model of how they interact

的空氣和水分子，也沒有一個足夠好的模型來說明它們如何相互作用。

or a fast enough computer to simulate all of their bajillion interactions. Maybe in

或足夠快的電腦來模擬他們所有的億萬次互動。也許在

principle, if he had enough data and a fast enough computer, his weather model could tell

原則上，如果他有足夠的數據和足夠快的電腦，他的天氣模型就能告訴他："你的天氣預報是什麼？

you exactly where every raindrop would fall. Right? This reasonable idea, that if you just

你的每一滴雨滴都會落在哪裡。對吧？這個合理的想法，如果你只是

had more data you could explain everything, is the classical, deterministic view of the

有更多的數據，你可以解釋一切， 是經典的，決定論的觀點。

universe.

宇宙。

And for a while, many physicists, including Einstein, thought the same had to be true

而有一段時間，包括愛因斯坦在內的許多物理學家都認為也必須如此

with quantum mechanics - maybe we just didn't have enough information to put into our quantum

與量子力學--也許我們只是沒有足夠的資訊放入我們的量子

models; maybe there were classical variables that were hidden from us and our experiments,

模型；也許有一些經典的變量被我們和我們的實驗所隱藏。

inputs that explained everything perfectly with no need for quantum mechanics and its

的輸入，完美地解釋了一切，不需要量子力學和它的。

"I'll give you 50/50 odds on the cat being dead" mentality.

"我'給你五五開的機會，貓死了"心態。

Except, it turns out that we can actually test whether or not this sort of classical,

只是，原來我們其實可以檢驗這種經典是否。

underlying explanation of quantum physics can exist even in principle. The details are

量子物理學的底層解釋即使在原則上也可以存在。細節是

a topic for another video, but the experiments tell us… there is no classical, everyday,

另一個視頻的主題， 但實驗告訴我們... 有沒有經典的，每天。

underlying description of quantum mechanics.

量子力學的基本描述。

And this means, Einstein, that the universe is quantum mechanical whether you like it

這意味著，愛因斯坦，宇宙是量子力學的，不管你是否喜歡。

with a 50% chance, or not.

有50%的機率，或者不。

ps, I'm excited to announce that MinutePhysics is now supported by MinutePhysics t-shirts.

ps，我'很興奮地宣佈，MinutePhysics現在由MinutePhysics T恤支持。

Get yours now at dftba.com/minutephysics and don't forget to be awesome.

現在就去dftba.com/minutephysics獲取你的作品，別忘了要厲害。