Image systems (Major System / PAO) encode the raw data into pictures; the palace sequences those pictures.

Think of it as division of labour:

• Major System — numbers → words/images.
• PAO — numbers or cards → compact Person-Action-Object images (compressing several items into one).
• Palace — stores whatever images you produced, in order, with random access.

Encoding and sequencing are separate problems; each tool solves one. The palace is the container that makes the others usable at scale.

Faint leftover images from previous content haunting a palace you've reused too soon — old ghosts mixing with new items.

If you store this week's shopping list in your home palace, then next week store a new list in the same palace before the first faded, you may "arrive" at the sofa and see both the old moon and the new rake. The fix: either let old content decay first before reusing, keep a rotation of several palaces, or reserve some palaces for permanent information you never overwrite.