If [Buddy Holly] hadn't championed [the Stratocaster's] use it would have gone out of production before Hendrix had a chance to play one.

Come on, Sir Roger, that is a really stupid thing to say. We can't possibly know.

If Paul McCartney had had a cold and not bothered going to Woolton Fete on 6th July, 1957, the Beatles might not have happened. No one can possibly know.