The Subfinality Index works the same way as the finality index, however, it is much weaker and allows more wiggle room.
A container which is n-subfinality contains all objects which follow n amount of properties. Unlike finality, however, they don't have to be in any specific order.
Objects which are strictly n-finality are also n-subfinality.
If container X contains all objects of property A and B, but the property B falls under the property A, then B is ignored when counting.
(This is just a modified version of the end-all-be-all index.)