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It is incorrect to say that entropy is a measure of randomness or chaos; in reality, entropy is a measure of possible combinations. Low entropy indicates a vast almost infinite range of possible combinations, whereas high entropy indicates the opposite. Every system (including the entire universe) exists in a state of either high or low entropy: a low-entropy system tends to maximize its entropy, while a system at maximum entropy tends to remain unchanged over time. However, entropy actually tells us nothing about chaos or probability. It stands to reason that a key possesses high entropy if and only if no patterns emerge that would allow it to be derived from a low-entropy state; if such patterns did exist, our "high-entropy" key wouldn't truly be high-entropy after all. If we want to discuss chaos, possibility, predictability, destiny, and free will, we have to venture into the realm of science fiction (I’d love to explore this further I enjoy melting my brain).