[golem14]

As Sherlock Holmes would say to Dr. Watson: "You see, but you don't observe".

So I quite agree with you - but it feels surprising that so many people just don't do any validation of their model in their head. _How_ the author was asking to draw the bicycle probably mattered. E.g. "immediately draw me a men’s bicycle, by heart" vs: "think about how a bicycle actually works and draw that".

BTW - In all honesty, it took me, too, a second to spot what was missing on the first picture.