Clarification. Duplicating multiple groups of layers in a "reasoning" loop

Normal:

  L1 -> L2 -> L3 -> L4 -> out

Unrolled (current framing):

  L1 -> [L2->L3] -> [L2->L3] -> L4 -> out

Looped (proposed):

       --<--loop----
       |           |

  L1 -> [L2->L3] x N --> L4 -> out

"reasoning loop"

Note: ascii rendering HN is not trivial