Week#3 Muddiest Point

Why boolean search using AND operations tends to produce high precision but low recall searches, while using OR operators gives low precision but high recall searches?

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Week #1 Muddiest Points

1. How does the website score the different webpage to evaluate the relationship between what the user wants and the provided links? 2. In the library, information retrieval system, will the reviews or adopt of the specific document will affect the future sort of the recommendations of the relative pieces of information?
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