# Choose/reject and teardown from memory

The learner can pick or reject a MessageChannel under mixed prompts — React callback, BroadcastChannel, implicit port, SharedWorker connect port, two-iframe mint, extra-pipe `close()` — without the lesson order as a cue. Mission success criteria in [[MISSION.md]] are demonstrated.

Evidence: the learner said they passed lesson 8 (six interleaved checks).

Implications: no further unit unless they ask. Issue #24 closed completed.