I don't really have anything exciting to say about day three. It was roughly the same as yesterday. She never made it to the toilet. We ran out of underwear because she had so many "accidents".
I had a friend come by, who RB took to right away (which is so rare), but then she kept pretending she had to go and then refusing to actually sit on the toilet. Show off...sort of. I talked to my friend a couple of days ago and she said that her daughter wouldn't learn to use the restroom until they took off even the underwear. So that's the plan for tomorrow.