Status: IN
Bridge and Decorator's independent demonstrations that composition prevents combinatorial class explosion (M×N and 2^n respectively) provide concrete structural proof for composition's status as the validated default reuse paradigm — the convergent-evolution and scalability arguments are abstract, while the explosion-prevention demonstrations are concrete and quantifiable.
Concrete explosion-prevention proofs independently validate the abstract composition-paradigm claim
Depends on (SL): bridge-decorator-dual-explosion-prevention, composition-paradigm-convergent-and-scalable-with-bounded-exception