Erros nas ciências

"At least all sources of error that occur in the natural sciences also occur in the social sciences: or, in other words the statistical problems of the social sciences cannot be less serious than those of the natural sciences. Consequently, the treatment of errors of observation in the social sciences has to be at least as extensive and the standards have to be at least as severe as in the natural sciences. In fact, however, there is much less occupation with errors than in the other fields." ~ Oskar Morgenstern