We don't. But Slash said something which could be interpreted that Hard Skool was the oldest of the bunch and that the other forthcoming singles were newer. So if Hard Skool dates back to 1997 or earlier, when Slash, Duff and Matt were in the band, Perhaps should be newer.  Btw, it is not proven that Hard Skool is as old as having started in 1996, but I was later informed - by a "source close to the band" - that the 1996 song that the band worked on, and which Duff and Matt talked abou