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A Guitarist can play middle C on five of their six guitar strings. Therein lies the big problem with sight-reading sheet music. Which "middle C" do you play? It is why Tab was created.
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Billy
Only guitarist who can read music know about middle C being played on 5 strings. Good for you!
The problem I see with Tabs are that guitarists, mostly young guns, rely on them. They take a song they know then look for the Tabs for it, ignoring notation completely. At least back in our day when we tried to play what was on the record we were developing ear training!
Remember the old Mel Bay guitar books? They would put a small number next to the first note of a riff indicating the starting fret then you had to figure out the rest. You learned the easiest way to play in various positions while learning notation.
YMMV