It's been established that in this edition, you can't Mesmerize someone into recalling things for you; if you say, "Tell me your mother's maiden name," what you get is "Your mother's maiden name." But it's also clear that you can use what memories you have to accomplish a task; if I say, "Go to the ATM, withdraw $2000 dollars, and bring it to me," that's something that can happen — even though they'd need to remember their ATM code to do it. (This was demonstrated when, in the third episode of the L.A. by Night livestream, Victor Temple is unable to compel the reporter to say what he knew about the car theft, but he was able to command him to go get his notebooks and bring them to the club.)
So, if I Dominate someone to "sing the Star-Spangled Banner," presuming they know the song, do they do so? Or do they struggle to harmonize on the phrase, "The Star Spangled Banner"? In broader terms, what is a good guideline for what the power of Mesmerism can and cannot accomplish in Vampire: the Masquerade 5th Edition?