And he tried to figure out why. And he came to the conclusion, quite on his own, that the students who could no longer solve problems, such as fixing cars, hadn't worked with their hands.
Snažil se zjistit proč. Došel k závěru, docela sám, že studenti, kteří nedokázali  řešit problémy, třeba opravit auto, předtím manuálně nepracovali.