Although I'm at Irena's side, I can't agree with her argument. Liyimia is asking for a way to guess the experimental section. I'm sure she means "guess" figure out, not a random prediction. Once a certain way to predict is invented, she doesn't have to risk her any score but save time and energy.
Yes, her motivation is very understandable. All I am saying is that it's too risky to guess which section the experimental is. There is no known strategy that is reliable for such guesses.
Why shall we care about her motivation? She's only asking for some formula to lock on the experimental section. She did not suggest or imply any random guess for the section. When there's none of techniques available, you shouldn't think she will alternatively try the random way. Therefore, there will be no place to talk about risk.