english: 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.
non_english: Hij probeerde te achterhalen waarom en kwam tot de conclusie, dat de studenten die geen problemen meer konden oplossen, zoals het repareren van auto's, nooit met hun handen hadden gewerkt.