Question: What is the main reason for manually reviewing about 120 validation examples that the model predicts incorrectly?

Sample answer: The goal is to inspect the mistakes, group them into common categories, and count how often each category appears so you can decide which problems to fix first.

Key points:

• Look through examples the model got wrong
• Group the errors into major types
• Use the counts to prioritize debugging work

Rubric: The response must explain that reviewing about 120 misclassified validation examples helps identify major error categories and rank them by frequency so the most important ones can be fixed first.