Aphantasia is a spectrum, but even when you can visualise a full realistic scene it should be easy for most people to tell the difference between that and seeing something physically. When you can’t tell the difference that’s a hallucination.
It’s only total aphantasia if you can’t visualise an image in your mind at all. I believe then you’d get more a concept of an apple than an image or other depiction of an apple but that’s only my understanding from hearing other people talking about it.
Aphantasia is a spectrum, but even when you can visualise a full realistic scene it should be easy for most people to tell the difference between that and seeing something physically. When you can’t tell the difference that’s a hallucination.
It’s only total aphantasia if you can’t visualise an image in your mind at all. I believe then you’d get more a concept of an apple than an image or other depiction of an apple but that’s only my understanding from hearing other people talking about it.