Comment by 01HNNWZ0MV43FF

> For example, while looking at biometric samples with up to thousands of observations, Karl Pearson declared that a result departing by more than 3 standard deviations is “definitely significant.”

Wait. Sir Arthur Conan Doyle lived at basically the exact same time as this Karl Pearson.

Is that why the Sherlock Holmes stories had handwriting analysis so frequently? Was there just pop science going around at the time that like, let's find correlations between anything and anything, and we can see that a criminal mastermind like Moriarty would certainly cross their T's this way and not that way?