Experience never errs; it is only your judgments that err by promising themselves effects such as are not caused by your experiments.[La sperieza no falla mai, ma sol fallano i vostri giuditi, promettendosi di quella efetti tali che ne’ uostri esperimeti causati no sono.]
Source:The Literary Works of Leonardo da Vinci (Richter, ed. 1883), Volume II, Section 1153, Page 282
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