Kimi's C7 Answer — '~5,200' Public-Use Airports Shows Appropriate Approximation

Kimi's C7 answer of '~5,200' for US public-use airports uses approximate notation (~) — appropriate since the exact number fluctuates. The FAA's most recent count is approximately 5,100 public-use airports, making ~5,200 a reasonable rounded estimate. The ~ notation demonstrates epistemic humility: Kimi knows this is an approximate answer and signals that uncertainty. This contrasts with the precise answers given for factual items (C3: 44, C5: C8H10N4O2) where exact values are known. The appropriate use of precision — exact for known constants, approximate for statistics — reveals sophisticated uncertainty calibration.