# Lesson 4 complete: deal-breakers and orphan-list retrieved

Learner finished lesson 4 with all quiz answers correct, including the second pass at lesson 3 C (orphan transfer list still detaches; clone never receives it). Treat as known: proxies throw; class instances flatten; implicit APIs already clone; huge graphs need patches/chunking/transfer; JSON is a document; transfer list is how, not what. Next ZPD: decision playbook — job / shape / move / risks as one design-review sentence.