Generated by claude-sonnet-4-6 · 2026-06-21 03:19 · grounding rag
Model Answer
(A) Viral Disease Outbreak
A viral disease outbreak has a high FN cost because missing an infected person (predicting negative when actually positive) can lead to undetected spread of disease, causing serious public health consequences.
Explanation
- False Negative (FN) = model predicts "No Disease/No Risk" but the actual case IS positive.
- In a viral outbreak, failing to identify an infected person is extremely dangerous (they spread the disease further), so FN cost is very high — Recall matters most here.
- Spam (FP cost is higher), Mining and Image Search are not life-critical, so FN cost is comparatively low.
- Examiners expect you to correctly identify the option and give a one-line justification.