[AndrewC]

There are lots of imaginary concepts

All concepts are imaginary as they are formed in the mind.

Next, I assume you will produce a sketch or a description of something that has no "real" parts.

Your wish is my command.

[js1138]

That top floor reminds me of the architecture of ID. If you zoom in on any one piece it appears to be self-consistent and logical, but the picture as a whole is absurd.