Maybe too late now, but i would like to point that I went to read Elasticsearch, Algolia, and Xapialand product descriptions before I made my comment, so I know well what Algolia is for, and in the example I gave, I was searching for a Headline, not for internal content inside the comments, and It was a headline that was in the first page of results at HN on that moment, so, I think I have phrased my comment in a polite way towards Algolia, understanding that search has more moving parts then the pattern matching algorithms of the logical core. :ps I am sincerely grateful for the information you gave in your comment, about Entities, Concepts and Relations on a Knowledge graph. This is exactly the kind of info I was looking for when I made the comment, so It was enlighting to know that, and thank you again.