Thanks for the kind words and for the heads up on the broken link, which I’ve now fixed. And good point about polo — a good reminder generally that all language is culturally-dependent. Perhaps “starbucks coffee” is a more universal example.

And there are ways to automatically estimate whether it’s better to use techniques like query expansion or relaxation to increase recall. These fall under the category of query performance prediction, a topic I’ll eventually discuss in detail.

High-Class Consultant.

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