Is there true randomness in the universe?
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The outcomes at the quantum level are truly random. That is, there is no way to predict the exact outcome from the starting position. That is why entropy in the universe is increasing: entropy is essentially the amount of information needed to describe the system, and each time a quantum event is randomly resolved, it adds that outcome to the sum of the information that defines the current state of the universe. A state that you couldn’t have known even if you had all the data to define a previous state. Quantum events may seem insignificant but, with the butterfly effect, those random outcomes will play a role in how our macroscopic world will unravel.
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