Most people agree that to be a successful musician you have to know theory, without it you will soon run into a wall that you can't get past. Sure you could learn a thousand songs from tab, but then you would be nothing more than a walking juke box. If this is all true then here's the question, how come some of the worlds best guitar players say they don't know theory at all. Jimi Hendrix couldn't read music. Slash not only can't read music but also can't tell you even what note he is playing. The original bass player from the Doobie Brothers never took a lesson, yet could school any of us who think we know what we are doing. So are these people lying to us, or is it true that 10 hours a day in your basement will make you great. Are these people using theory without realizing it, when you consider Eddie Van Halen his music is too complex to come out of nothing, same with Lindsay Buckingham. It seems to me that these players took the hours that it would take to learn theory and instead practiced their instrament and got ahead of the game, years ahead. So what do you day on the matter.