Wrong (declarative). If I had said, 'they are both equal' it would be declarative. However, I said, "I say that they are both equal". That is an opinion, not a declaration.
Musical training? Take piano, violin, guitar lessons...whatever. You will learn scales, notes, chords. If your ear isn't tin, you will develop an ear for what a note should sound like and when a singer is sharp or flat on a note. If you are really good, you will even develop an ear for the degree of sharpness and flatness but still, what you hear should only be stated and interpreted as your opinion.
Updated On: 5/1/13 at 06:22 PM