Yes I know this rule: no thumb on black keys. My teacher says it is dumb, and I agree. It depends on the musical context. Thumb on black key can be a disaster o

Yes I know this rule: no thumb on black keys. My teacher says it is dumb, and I agree. It depends on the musical context. Thumb on black key can be a disaster or a brilliant solution. There a no rules and a lot of factors to consider. Good fingering is very subjective and depends foremost on musical understanding of the desired emotional outcome. I do not understand what statistics or machine learning can add here.