I’ve been trying to find a coherent and factual answer to this for some time. The typical guitar fret board has dots located on the 3, 5, 7, 9, 12, 15, 17, 21 frets. One would think that this coincides with the major scale. One would be wrong. In this configuration they designate G, A, B, C# (Db), E, and repeat, as the 12th fret is the octave. It would seem to make more sense to have 4th dot on the 8th fret and another dot on the 10th fret, designating C and D, but I’m probably way out in left field on this.
Now, it’s quite possible that I’ve seen a factual answer and just didn’t understand what the hell it was telling me. I’m far from having any meaningful education in music theory. Answers online range from “it’s just tradition” to confusingly technical answers.
Can anyone point to a definitive answer, or provide a factual answer to this?