Status: IN
The closed taxonomy (three strategies exhaust the problem space) combined with universal reducibility to adapted streaming means the solution space has a normal form: every solution is either raw streaming or preprocessing-adapted streaming, and no solution lies outside this classification — the taxonomy is not just descriptive but canonical.
closed taxonomy + universal streaming reduction = every solution has a canonical streaming form
Depends on (SL): all-solutions-reduce-to-adapted-streaming, taxonomy-closed-and-structurally-partitioned