However, the further retention of the data should be allowed where it is necessary for historical, statistical and scientific research purposes, for exercising the right of freedom of expression, when required by law, or where there is a reason to restrict the processing of the data instead of erasing them.
Finally is a little saying my con law professor at Yale had about judges who dive too deeply into arcana like school-funding ratios or statistical models purporting to show racial discrimination in capital punishments.