This scene was a no brainer !!!!!!!!!!!! Profs and Principles in a college aren't so daft !!!
Firstly how the hell do you copy a paper from some one behind you , you have to be an expert at reading words reading upside down.
secondly , Rano has a reputation of being brainy , while the guy behind her is a known flunky, and a duffer. So teachers are aware of sych facts and never take things in the face value.
Also a teacher in doubt would have taken both papers and then examined them to see who has written more , because the person who is cheating would have been writing less stuff.
I mean if you want to show a scene where Rano got caught in some one's mistake , they could have shown the scene differently. Like the guy behind her was cheating from a "furra" or a "slip of paper" and that paper falls under Ranos table and she gets caught.
Don't you think?