There was an item on HN and elsewhere, probably reposted every so often, where a researcher asked a bunch of people to draw a bicycle from memory, and not one o

There was an item on HN and elsewhere, probably reposted every so often, where a researcher asked a bunch of people to draw a bicycle from memory, and not one of them drew something physically reasonable. So that seems to suggest that about 0% of "normal people" have "visual imagination". What proportion of people can disassemble a mechanical device and remember how to reassemble it without taking photos? If it is substantial, why do most people who can afford it have professional mechanics do even simple things? What about people who have vivid visual dreams, but cannot retrieve details of things seen on awakening? Are they "aphantasic" or not? Surely the vast majority of people cannot draw or paint a familiar object in detail from memory, if put to the test. It's utterly useless to do "science" that starts with assuming everybody has a clear and consistent definition of a word denoting the subjective experience being investigated.