[bonoboTP]

Another thing is this effect: https://cognitivewonderland.substack.com/p/meta-knowledge-an...

People will claim a lot of things but if there is no external "ground truth" to test against, people tend to overclaim. They will tell you they can imagine a penny or the apple logo or whatever it is, but then fail these objective tests.

If you can pass or fail the aphantasia test simply by saying words that are up to introspection, it won't be a useful test. Most people under most circumstances simply say what their concept of a normal person is supposed to say.