I teach at the MFA. Because of the fact that the students have constant duty, all kinds of patrols and other nonsense, they are often unprepared, and the military officers are terribly mocked for "news". In this regard, I allow at the beginning of the class some to report that they are not ready on the condition that the topic will be worked out at the next consultation.
In one of the groups, twins are taught, so similar that the mother-in-law cannot distinguish.
Q: Comrade Major, I am not ready, please allow me to work for consultation?
Who are you, Denis or Semen?
Q: No matter, write down any...
Oh how is it? Who will come from you to work?
Whoever is ready will come.