Thomas Shey
Legend
Which is fine, because in the end it is something of an educated-guessing game.
No, its really not, when the communication breakdown can end up making the "guess" badly wrong for no in-world or, character relevant, or even player-centric reason.
She's better than you, sure, but how much better? Is she barely better than you and just getting lucky with her attacks, or is she stupendously better than you but pulling her blows, or ???
I did martial arts for a number of years. It wasn't normally hard to tell someone with superior technique from someone getting lucky.