The rules for when you are and aren't allowed to quote copyrighted material are long, boring, but fairly well established.
> Almost every thread on HN has somebody quote part of the article inline.
Which is very much a violation of copyright if it's pasted verbatim. However, those comments which quote line-by-line with responses and commentary is covered under fair use.
> Almost every thread on HN has somebody quote part of the article inline.
Which is very much a violation of copyright if it's pasted verbatim. However, those comments which quote line-by-line with responses and commentary is covered under fair use.