contraversia
From LSJ
ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
contrāversia, s. contrōversia a. E..
contraversia contraversiae N F :: controversy/dispute; debate; moot case debated in school, forensic exercise