Recalled the chain-rule framing from memory; stumbled on computational-graph ordering. Verdict: solid. Interval 6d → 15d, next due 2026-09-15.

Covered cost functions, the update rule, and learning-rate behaviour. The cooking analogy (turning the stove down as the soup nears done) landed well. Weak spot: distinguishing convergence from oscillation.

Quiz: 7/8 (88%) — passed · re-quiz not needed

{{2–5 sentences: what was studied, scores, gaps found, next steps.}}