The speaker begins by explaining the concept of probability in everyday scenarios, using the example of predicting rain. They state that a 50% chance of rain is assigned due to incomplete knowledge of the weather system, specifically the precise location and state of water molecules in the clouds. This uncertainty, or ignorance, is the basis for assigning probabilities in classical systems. The speaker then introduces a key distinction in quantum theory: that these probabilities are not merely a reflection of ignorance but are fundamental to the system itself.

Science Every Seconds

So, usually we'd say, "Well, there's a 50% chance it's going to rain tomorrow." And why do we say that? Why would we say such a thing?

It's because we have incomplete knowledge of the system, in this case, the weather. And so, we have incomplete understanding of where, I suppose at the most basic level, all those water molecules are in the clouds and so on. But we don't have enough knowledge to make to precisely calculate what is going to happen.

And so we assign probabilities to it, which reflects our ignorance of the situation. The key difference in quantum theory is that these probabilities are fundamental.

Is probability just an excuse for not knowing? Quantum physics says NO. 🤯

So, usually we'd say, well, there's a a
50% chance it's going to rain tomorrow.
And why do we say that? Why we would say
such a thing? It's because we have
incomplete knowledge of the system, in
this case, the weather. And so, we we
have incomplete understanding of where I
suppose at the most basic level all
those water molecules are in the clouds
and so on, but we we don't we don't have
enough knowledge to make to precisely
calculate what is going to happen. And
so we assign probabilities to it which
that that reflects our ignorance of the
situation. The key difference in quantum
theory is that these prob probabilities
are fundamental.

Get Our Mobile App

Is probability just an excuse for not knowing? Quantum physics says NO. 🤯

Transcription