Unit 2 Muddiest Points

There are some questions about Unit 2:

1. Is that people can fully trust Automatic Indexing?
I mean maybe we have to rely on people to review the content(e.g inappropriate content) and then create the index.

2. How do IR system to measure and find correct words if users mistype or use the wrong grammar?

3. Some people would search words which combined English words with translation in another language(e.g brand name).
Is that possible the system can process separately or process once?

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