> There is no guarantee that the content of a particular URL will remain the same over time Shortly after the article in question was first published I read it

> There is no guarantee that the content of a particular URL will remain the same over time Shortly after the article in question was first published I read it and sent it to a friend I knew would be interested. By the time he got around to seeing/reading it (later that night) the article had drastically changed - which I didn't realize until the next day (when reading a post on HN discussing the changes). In addition to emailing my friend I had shared it on Twitter and Facebook. After reading the updated article that is not one I would have sent to my friend or shared (I ended up deleting the tweet and FB post after reading the "new" article). I don't think anyone expects some "guarantee" content will not change - but when you link to an article from a reputable source you don't expect it to change to the magnitude this one did. When I share an article (by any means) I'm saying "hey, here's an article I think other people should read" - there shouldn't be a need to go back hours later to make sure that implicit statement is still true.