Some people can't see mental images

I’ve read tons of these and still have no idea if I have aphantasia or not. I can’t understand whether people just have different ways of describing what’s in their minds eye or if there’s really a fundamental difference.

The test is this:

Close your eyes and try to visualize an apple. Do this for 30 seconds or so. Try to visualize the skin, the reflection, the texture, the stem, the depth, etc. Try to hold a stable mental picture of that apple.

After the 30 seconds, rate your ability to picture the apple from 1 to 5, where 1 is complete inability and 5 is as if you were looking at a picture of an apple for those 30 seconds. 1 is aphantasia.

Another idea is to recall a vivid dream you had. I think most people would describe it as being part of a movie or reality. While awake, are you able to recreate scenes in vivid detail as if you were dreaming? 5 for complete parity and 1 for not at all. 1 is aphantasia.

Are you really saying you can see an apple in the same way you see an apple with eyes opened? The exact same way? So if you close your eyes, imagine an apple and then look at an apple that someone holds in front of your eye, the apple looks exactly the same? As if you could look through your closed eye lids?

Some people can project the image of an apple into the real world. As in, they are able to imagine an apple on the table that they see with their eyes. They 'see' it, but see that it's a projection. It's a lot like when you have two very similar images (except one change), and you cross your eyes such that they overlap to highlight the change (it's ghostly, as it's only seen in one eye). Same Idea, only instead of the other eye, that projection is coming from your brain.

That's interesting, so how can people like that know which is real and which is not? I don't understand it.