gwern comments on Rationality Quotes: December 2010 - Less Wrong

6 Post author: Tiiba 03 December 2010 03:23AM

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Comment author: gwern 12 September 2011 12:59:58AM 0 points [-]

Patient groups and techniques change over time, assuming the data was even recorded in the first place. (eg. a lot of data from the past would not be useful today as a direct comparison or control group, simply because diets have changed so much.)