time series

"here, you, why are you sleeping? go wash your face and come back" - 9th standard

"why are you sitting with that guy? didn't no one tell you to cover your mouth when you cough?" - 11th standard

"you know, you remind me of this russian character who grows a moustache to join an army" - 2nd yr BA

"..ah yes, he played the village idiot rather well..."

"you're really saying that? you ought to really study hard if you're going to pass..." - 2nd year MA

"why the hell do you come here at all? what is it you want to do anyway?" - 2nd yr, PhD

"you're not good at specifying details...this could cost you..." - 4th yr PhD

dogged persistence in the face of mounting evidence to the contrary, you betcha.