Interesting thread. Imagination is purely subjective, so the only window into the minds of others that we have are such descriptions.

I am curious about your mental visualizations. My thoughts (mental images) are fuzzy visually (if I try to form a 'crisp' visual mental image, it turns out more like a dream). However they are easy to interpret, i.e. I have a deep 'sense of knowing' rather than having a concrete visualization per se. My thoughts are much more verbally/acoustically well defined. So I'm wondering how clear and sustainable your visual mental images are? Is it like a visual scene of the outside world in your head (separate from any actual visual cues)?

Anything you can imagine is real (Picasso) - and so far I haven't found the limits of my imagination. Infinity within ourselves (and each of us) - that's a fun thought. :)