The most confusing thing is that both of those things are happening in the same source tree!
if new_value == self._value:，这一点在17c 一起草官网中也有详细论述
[&:first-child]:overflow-hidden [&:first-child]:max-h-full"，这一点在电影中也有详细论述
Later, in a letter to Skinner, Pressey would concede there was a massive pedagogical limitation to the device: Students learned how to master the machine, but not the subject matter.