Approach 8. Rely as much as possible upon laws of nature to approach physical impossibility of high consequences.

Rec. 1. Anti-lock brakes

Rec. 2. Hang glider air foil that becomes a parachute instead of stalling

Level IV: Surety by laws of nature and mathematics

To what degree are these based on Approach 8?

Approach 7. Predictable cumulative/comparative/adaptive positive measures.

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