What is a 'Black box'? Explain its significance in flight safety and airplane crash investigations.

The spine toppers built

1. Open

   • Define the key term first
   • Context-hook opening

2. Build

   • Numbered enumeration
   • Directive-mirroring headers
   • Segmented multi-part answer

3. Close

   • Verdict conclusion
   • Forward-looking close

constructionMoves they converged on

• Numbered enumeration79% of answers

  Enumerate points as a numbered list.

• Example as evidence47% of answers

  Tag a concrete example explicitly as evidence.

• Data as argument39% of answers

  Use a figure to carry the argument, not decorate it.

• Define the key term first39% of answers

  Open by defining the central term.

• Directive-mirroring headers39% of answers

  Headers that mirror the question's directive.

stairsEvidence toppers carried (per answer)