I was reviewing a question where I noticed that it was recommended to "future proof" older answers. I must admit that even after searching http://meta.askubuntu.com/search?q=future+proof I'm baffled as to what this actually means. I'm all for updating Q&A's as we go but as I'm only human I don't know the future. So I'm curious as to whether there is an approved definition of this phrase or failing that, any tips on how to see far enough into the future to actually manage this.