More than that, I have written guitar riffs and melodies and latter found that they are the same as a song I have never heard before! I am sure this due to the

More than that, I have written guitar riffs and melodies and latter found that they are the same as a song I have never heard before! I am sure this due to the very constrained nature of what is practical to reach with your fingers, the nature of the interval between strings, the tricks that hammer-ons allow you to do between certain notes and not others, the way it is easier to apply vibrato and bends to notes around half way up the neck and on the thinner 3 strings. Millions of possibilities for the competent jazz guitarist, but few of them are practical for normal people.