What does that matter? It 'can be used as a record of, a guide to, or a means to perform, a song or piece of music. Sheet music enables instrumental performers who are able to read music notation (a pianist, orchestral instrument players, a jazz band, etc.) or singers to perform a song or piece.' It is a record, guide or a means to performance.. which you lack. Congrats on sticking up for yourself and not learning something. I prefer my approach, and will leave you to your ignorance.