if you paste this thread into the demo you get not very encouraging results. I haven't looked at the code but I suspect they find the sentences with most (cosine) similarity to the title and bias towards early sentences.
results:
- Hacker Newsnew | threads | comments | ask | jobs | submit hnriot (1618) | logout upvote TextTeaser – An automatic - summarization algorithm (github.com) - If you leave the "Title" field empty and click "Summarize", nothing happens -- which I thought was very confusing. - reply upvote downvote MojoJolo 1 hour ago | link I require the title because I need it for the algorithm. - not a criticism of textteaser (which was behind this excellent project https://news.ycombinator.com/item?id=6498625), - reply upvote downvote wikiburner 3 minutes ago | link Is this a well known text summarization tool?