On the importance of randomization

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Correlation can imply causation

“A coincidence! Here is one of the three men who we had named as possible actors in this drama, and he meets a violent death during the very hours when we know that the drama was being enacted. The odds are enormous against its being a coincidence. No figures could express them. No, my dear Watson, the two events are connected-must be connected. It is for us to find the connection.”

Sherlock Holmes