A building doesn't tell its designers whether or not the people inside like being there, and the toy manufacturer doesn't know if a toy is actually being played with -- how and where and whether or not it's any fun.
Budova neřekne svému návrháři, zda se lidem uvnitř líbí či nikoliv, a výrobce hraček neví, jestli si s hračkou opravdu někdo hraje ‒ jak a kde si hraje a zda se s ní baví.