[NamTaf]

I suspect this is more that when people look at a bike, they don't notice detail and just recall the concept of a bike having two wheels - one forward and one back, a seat, some handles, etc.

Their failure to draw an accurate bike is in fact proof they don't have a photographic memory, rather than they can't visualise one. That is to say, they're entirely capable of visualising a bike that is incorrect from an engineering design perspective.

[oluckyman]

Then the “images” most people say they can imagine in their “mind’s eye” might be little different from what an aphantasiac like me would produce if asked to draw them. Perhaps I am not missing much at all.